122215531 has 4 divisors (see below), whose sum is σ = 122647672. Its totient is φ = 121783392.

The previous prime is 122215523. The next prime is 122215553. The reversal of 122215531 is 135512221.

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 122215531 - 2³ = 122215523 is a prime.

It is a super-2 number, since 2×122215531² = 29873272035223922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (122215501) 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, 215646 + ... + 216211.

It is an arithmetic number, because the mean of its divisors is an integer number (30661918).

Almost surely, 2^122215531 is an apocalyptic number.

122215531 is a deficient number, since it is larger than the sum of its proper divisors (432141).

122215531 is an equidigital number, since it uses as much as digits as its factorization.

122215531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432140.

The product of its digits is 600, while the sum is 22.

The square root of 122215531 is about 11055.1133417980. The cubic root of 122215531 is about 496.2594611871.

Adding to 122215531 its reverse (135512221), we get a palindrome (257727752).

The spelling of 122215531 in words is "one hundred twenty-two million, two hundred fifteen thousand, five hundred thirty-one".