31552129 has 12 divisors (see below), whose sum is σ = 36822000. Its totient is φ = 26957448.

The previous prime is 31552127. The next prime is 31552139. The reversal of 31552129 is 92125513.

It is not a de Polignac number, because 31552129 - 2¹ = 31552127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31552097 and 31552106.

It is not an unprimeable number, because it can be changed into a prime (31552127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17722 + ... + 19420.

It is an arithmetic number, because the mean of its divisors is an integer number (3068500).

Almost surely, 2^31552129 is an apocalyptic number.

It is an amenable number.

31552129 is a deficient number, since it is larger than the sum of its proper divisors (5269871).

31552129 is a wasteful number, since it uses less digits than its factorization.

31552129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2092 (or 2085 counting only the distinct ones).

The product of its digits is 2700, while the sum is 28.

The square root of 31552129 is about 5617.1281808412. The cubic root of 31552129 is about 315.9920984244.

The spelling of 31552129 in words is "thirty-one million, five hundred fifty-two thousand, one hundred twenty-nine".