31625705541 has 4 divisors (see below), whose sum is σ = 42167607392. Its totient is φ = 21083803692.

The previous prime is 31625705533. The next prime is 31625705597. The reversal of 31625705541 is 14550752613.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14550752613 = 3 ⋅4850250871.

It is not a de Polignac number, because 31625705541 - 2³ = 31625705533 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31625705541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31625705141) 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, 5270950921 + ... + 5270950926.

It is an arithmetic number, because the mean of its divisors is an integer number (10541901848).

Almost surely, 2^31625705541 is an apocalyptic number.

It is an amenable number.

31625705541 is a deficient number, since it is larger than the sum of its proper divisors (10541901851).

31625705541 is a wasteful number, since it uses less digits than its factorization.

31625705541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10541901850.

The product of its (nonzero) digits is 126000, while the sum is 39.

The spelling of 31625705541 in words is "thirty-one billion, six hundred twenty-five million, seven hundred five thousand, five hundred forty-one".