31133420402 has 32 divisors (see below), whose sum is σ = 55709275392. Its totient is φ = 12758828544.

The previous prime is 31133420393. The next prime is 31133420459. The reversal of 31133420402 is 20402433113.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1177358 + ... + 1203510.

It is an arithmetic number, because the mean of its divisors is an integer number (1740914856).

Almost surely, 2^31133420402 is an apocalyptic number.

31133420402 is a deficient number, since it is larger than the sum of its proper divisors (24575854990).

31133420402 is a wasteful number, since it uses less digits than its factorization.

31133420402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29882.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 31133420402 its reverse (20402433113), we get a palindrome (51535853515).

The spelling of 31133420402 in words is "thirty-one billion, one hundred thirty-three million, four hundred twenty thousand, four hundred two".