31001240402 has 16 divisors (see below), whose sum is σ = 50732006400. Its totient is φ = 14090721840.

The previous prime is 31001240399. The next prime is 31001240411. The reversal of 31001240402 is 20404210013.

It is a super-2 number, since 2×31001240402² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 783224 + ... + 821852.

It is an arithmetic number, because the mean of its divisors is an integer number (3170750400).

Almost surely, 2^31001240402 is an apocalyptic number.

31001240402 is a deficient number, since it is larger than the sum of its proper divisors (19730765998).

31001240402 is a wasteful number, since it uses less digits than its factorization.

31001240402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75121.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 31001240402 its reverse (20404210013), we get a palindrome (51405450415).

The spelling of 31001240402 in words is "thirty-one billion, one million, two hundred forty thousand, four hundred two".