122531217 has 4 divisors (see below), whose sum is σ = 163374960. Its totient is φ = 81687476.

The previous prime is 122531203. The next prime is 122531219. The reversal of 122531217 is 712135221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 122531217 - 2⁶ = 122531153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122531219) 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, 20421867 + ... + 20421872.

It is an arithmetic number, because the mean of its divisors is an integer number (40843740).

Almost surely, 2^122531217 is an apocalyptic number.

It is an amenable number.

122531217 is a deficient number, since it is larger than the sum of its proper divisors (40843743).

122531217 is an equidigital number, since it uses as much as digits as its factorization.

122531217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40843742.

The product of its digits is 840, while the sum is 24.

The square root of 122531217 is about 11069.3819610672. The cubic root of 122531217 is about 496.6863776591.

Adding to 122531217 its reverse (712135221), we get a palindrome (834666438).

The spelling of 122531217 in words is "one hundred twenty-two million, five hundred thirty-one thousand, two hundred seventeen".