31438125 has 80 divisors (see below), whose sum is σ = 61480320. Its totient is φ = 16038000.

The previous prime is 31438111. The next prime is 31438133. The reversal of 31438125 is 52183413.

It is a happy number.

It is not a de Polignac number, because 31438125 - 2⁴ = 31438109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

Its product of digits (2880) is a multiple of the sum of its prime factors (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1366864 + ... + 1366886.

It is an arithmetic number, because the mean of its divisors is an integer number (768504).

Almost surely, 2^31438125 is an apocalyptic number.

It is an amenable number.

31438125 is a deficient number, since it is larger than the sum of its proper divisors (30042195).

31438125 is an frugal number, since it uses more digits than its factorization.

31438125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64 (or 31 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 31438125 is about 5606.9711074697. The cubic root of 31438125 is about 315.6110587575.

The spelling of 31438125 in words is "thirty-one million, four hundred thirty-eight thousand, one hundred twenty-five".