31625152643 has 4 divisors (see below), whose sum is σ = 36143031600. Its totient is φ = 27107273688.

The previous prime is 31625152639. The next prime is 31625152673. The reversal of 31625152643 is 34625152613.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34625152613 = 114547 ⋅302279.

It is a cyclic number.

It is not a de Polignac number, because 31625152643 - 2² = 31625152639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31625152597 and 31625152606.

It is not an unprimeable number, because it can be changed into a prime (31625152613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2258939468 + ... + 2258939481.

It is an arithmetic number, because the mean of its divisors is an integer number (9035757900).

Almost surely, 2^31625152643 is an apocalyptic number.

31625152643 is a deficient number, since it is larger than the sum of its proper divisors (4517878957).

31625152643 is an equidigital number, since it uses as much as digits as its factorization.

31625152643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4517878956.

The product of its digits is 129600, while the sum is 38.

The spelling of 31625152643 in words is "thirty-one billion, six hundred twenty-five million, one hundred fifty-two thousand, six hundred forty-three".