222501531 has 8 divisors (see below), whose sum is σ = 339049984. Its totient is φ = 127143720.

The previous prime is 222501523. The next prime is 222501553. The reversal of 222501531 is 135105222.

222501531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 222501531 - 2³ = 222501523 is a prime.

It is a super-2 number, since 2×222501531² = 99013862594687922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 10595311 = 222501531 / (2 + 2 + 2 + 5 + 0 + 1 + 5 + 3 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 222501498 and 222501507.

It is not an unprimeable number, because it can be changed into a prime (222501131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5297635 + ... + 5297676.

It is an arithmetic number, because the mean of its divisors is an integer number (42381248).

Almost surely, 2^222501531 is an apocalyptic number.

222501531 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

222501531 is a deficient number, since it is larger than the sum of its proper divisors (116548453).

222501531 is a wasteful number, since it uses less digits than its factorization.

222501531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10595321.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 222501531 is about 14916.4852093246. The cubic root of 222501531 is about 605.9605268977.

Adding to 222501531 its reverse (135105222), we get a palindrome (357606753).

The spelling of 222501531 in words is "two hundred twenty-two million, five hundred one thousand, five hundred thirty-one".