31004221040 has 80 divisors (see below), whose sum is σ = 79728001248. Its totient is φ = 11138300928.

The previous prime is 31004220997. The next prime is 31004221051. The reversal of 31004221040 is 4012240013.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×31004221040² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 364382 + ... + 441341.

Almost surely, 2^31004221040 is an apocalyptic number.

It is an amenable number.

31004221040 is an abundant number, since it is smaller than the sum of its proper divisors (48723780208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31004221040 is a wasteful number, since it uses less digits than its factorization.

31004221040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805786 (or 805780 counting only the distinct ones).

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

Adding to 31004221040 its reverse (4012240013), we get a palindrome (35016461053).

The spelling of 31004221040 in words is "thirty-one billion, four million, two hundred twenty-one thousand, forty".