31040002442 has 4 divisors (see below), whose sum is σ = 46560003666. Its totient is φ = 15520001220.

The previous prime is 31040002423. The next prime is 31040002463. The reversal of 31040002442 is 24420004013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24420004013 = 59357 ⋅411409.

It can be written as a sum of positive squares in only one way, i.e., 26215171921 + 4824830521 = 161911^2 + 69461^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7760000609 + ... + 7760000612.

Almost surely, 2^31040002442 is an apocalyptic number.

31040002442 is a deficient number, since it is larger than the sum of its proper divisors (15520001224).

31040002442 is a wasteful number, since it uses less digits than its factorization.

31040002442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15520001223.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 31040002442 its reverse (24420004013), we get a palindrome (55460006455).

The spelling of 31040002442 in words is "thirty-one billion, forty million, two thousand, four hundred forty-two".