31401243634 has 8 divisors (see below), whose sum is σ = 47106981468. Its totient is φ = 15698916480.

The previous prime is 31401243611. The next prime is 31401243637. The reversal of 31401243634 is 43634210413.

It can be written as a sum of positive squares in 2 ways, for example, as 22769904609 + 8631339025 = 150897^2 + 92905^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 31401243596 and 31401243605.

It is not an unprimeable number, because it can be changed into a prime (31401243637) 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, 829527 + ... + 866554.

Almost surely, 2^31401243634 is an apocalyptic number.

31401243634 is a deficient number, since it is larger than the sum of its proper divisors (15705737834).

31401243634 is a wasteful number, since it uses less digits than its factorization.

31401243634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1705340.

The product of its (nonzero) digits is 20736, while the sum is 31.

The spelling of 31401243634 in words is "thirty-one billion, four hundred one million, two hundred forty-three thousand, six hundred thirty-four".