31421501025 has 24 divisors (see below), whose sum is σ = 53055544704. Its totient is φ = 16401576000.

The previous prime is 31421501021. The next prime is 31421501039. The reversal of 31421501025 is 52010512413.

It is a happy number.

It is not a de Polignac number, because 31421501025 - 2² = 31421501021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31421500986 and 31421501004.

It is not an unprimeable number, because it can be changed into a prime (31421501021) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 4453426 + ... + 4460475.

It is an arithmetic number, because the mean of its divisors is an integer number (2210647696).

Almost surely, 2^31421501025 is an apocalyptic number.

It is an amenable number.

31421501025 is a deficient number, since it is larger than the sum of its proper divisors (21634043679).

31421501025 is a wasteful number, since it uses less digits than its factorization.

31421501025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8913961 (or 8913956 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The spelling of 31421501025 in words is "thirty-one billion, four hundred twenty-one million, five hundred one thousand, twenty-five".