31540701603 has 4 divisors (see below), whose sum is σ = 42054268808. Its totient is φ = 21027134400.

The previous prime is 31540701593. The next prime is 31540701637. The reversal of 31540701603 is 30610704513.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30610704513 = 3 ⋅10203568171.

It is not a de Polignac number, because 31540701603 - 2⁶ = 31540701539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31540701653) 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, 5256783598 + ... + 5256783603.

It is an arithmetic number, because the mean of its divisors is an integer number (10513567202).

Almost surely, 2^31540701603 is an apocalyptic number.

31540701603 is a deficient number, since it is larger than the sum of its proper divisors (10513567205).

31540701603 is a wasteful number, since it uses less digits than its factorization.

31540701603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10513567204.

The product of its (nonzero) digits is 7560, while the sum is 30.

The spelling of 31540701603 in words is "thirty-one billion, five hundred forty million, seven hundred one thousand, six hundred three".