31625042 has 8 divisors (see below), whose sum is σ = 47873100. Its totient is φ = 15667344.

The previous prime is 31625039. The next prime is 31625057. The reversal of 31625042 is 24052613.

It can be written as a sum of positive squares in 2 ways, for example, as 31147561 + 477481 = 5581^2 + 691^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×31625042³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31624999 and 31625017.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72317 + ... + 72752.

Almost surely, 2^31625042 is an apocalyptic number.

31625042 is a deficient number, since it is larger than the sum of its proper divisors (16248058).

31625042 is a wasteful number, since it uses less digits than its factorization.

31625042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145180.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 31625042 is about 5623.6146738552. The cubic root of 31625042 is about 316.2353171642.

Adding to 31625042 its reverse (24052613), we get a palindrome (55677655).

The spelling of 31625042 in words is "thirty-one million, six hundred twenty-five thousand, forty-two".