22152031 has 4 divisors (see below), whose sum is σ = 24165864. Its totient is φ = 20138200.

The previous prime is 22152029. The next prime is 22152061. The reversal of 22152031 is 13025122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22152031 - 2¹ = 22152029 is a prime.

It is a super-2 number, since 2×22152031² = 981424954849922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22151996 and 22152014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22152061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1006900 + ... + 1006921.

It is an arithmetic number, because the mean of its divisors is an integer number (6041466).

Almost surely, 2^22152031 is an apocalyptic number.

22152031 is a deficient number, since it is larger than the sum of its proper divisors (2013833).

22152031 is a wasteful number, since it uses less digits than its factorization.

22152031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2013832.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 22152031 is about 4706.5944163482. The cubic root of 22152031 is about 280.8479017137.

Adding to 22152031 its reverse (13025122), we get a palindrome (35177153).

The spelling of 22152031 in words is "twenty-two million, one hundred fifty-two thousand, thirty-one".