31129422 has 16 divisors (see below), whose sum is σ = 62387280. Its totient is φ = 10355072.

The previous prime is 31129411. The next prime is 31129433. The reversal of 31129422 is 22492113.

It is an interprime number because it is at equal distance from previous prime (31129411) and next prime (31129433).

It is a junction number, because it is equal to n+sod(n) for n = 31129392 and 31129401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2043 + ... + 8150.

It is an arithmetic number, because the mean of its divisors is an integer number (3899205).

Almost surely, 2^31129422 is an apocalyptic number.

31129422 is an abundant number, since it is smaller than the sum of its proper divisors (31257858).

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

31129422 is a wasteful number, since it uses less digits than its factorization.

31129422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10707.

The product of its digits is 864, while the sum is 24.

The square root of 31129422 is about 5579.3746961465. The cubic root of 31129422 is about 314.5746236126.

The spelling of 31129422 in words is "thirty-one million, one hundred twenty-nine thousand, four hundred twenty-two".