31402013402 has 8 divisors (see below), whose sum is σ = 47110307412. Its totient is φ = 15698577600.

The previous prime is 31402013371. The next prime is 31402013411. The reversal of 31402013402 is 20431020413.

It can be written as a sum of positive squares in 2 ways, for example, as 31096148281 + 305865121 = 176341^2 + 17489^2 .

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

It is a super-2 number, since 2×31402013402² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1198349 + ... + 1224272.

Almost surely, 2^31402013402 is an apocalyptic number.

31402013402 is a deficient number, since it is larger than the sum of its proper divisors (15708294010).

31402013402 is a wasteful number, since it uses less digits than its factorization.

31402013402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2429104.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 31402013402 its reverse (20431020413), we get a palindrome (51833033815).

The spelling of 31402013402 in words is "thirty-one billion, four hundred two million, thirteen thousand, four hundred two".