31471574642 has 16 divisors (see below), whose sum is σ = 47470947480. Its totient is φ = 15648006528.

The previous prime is 31471574627. The next prime is 31471574647. The reversal of 31471574642 is 24647517413.

It can be written as a sum of positive squares in 4 ways, for example, as 30768317281 + 703257361 = 175409^2 + 26519^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31471574593 and 31471574602.

It is not an unprimeable number, because it can be changed into a prime (31471574647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 803948 + ... + 842184.

Almost surely, 2^31471574642 is an apocalyptic number.

31471574642 is a deficient number, since it is larger than the sum of its proper divisors (15999372838).

31471574642 is a wasteful number, since it uses less digits than its factorization.

31471574642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40525.

The product of its digits is 564480, while the sum is 44.

The spelling of 31471574642 in words is "thirty-one billion, four hundred seventy-one million, five hundred seventy-four thousand, six hundred forty-two".