31000122 has 24 divisors (see below), whose sum is σ = 67476864. Its totient is φ = 10285704.

The previous prime is 31000087. The next prime is 31000127. The reversal of 31000122 is 22100013.

It is a happy number.

It is a super-2 number, since 2×31000122² = 1922015128029768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (31000127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 153 + ... + 7875.

It is an arithmetic number, because the mean of its divisors is an integer number (2811536).

Almost surely, 2^31000122 is an apocalyptic number.

31000122 is an abundant number, since it is smaller than the sum of its proper divisors (36476742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31000122 is a wasteful number, since it uses less digits than its factorization.

31000122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7954 (or 7951 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 31000122 is about 5567.7753187427. The cubic root of 31000122 is about 314.1384773337.

Adding to 31000122 its reverse (22100013), we get a palindrome (53100135).

The spelling of 31000122 in words is "thirty-one million, one hundred twenty-two", and thus it is an aban number.