31004233421 has 16 divisors (see below), whose sum is σ = 37566681600. Its totient is φ = 24995230128.

The previous prime is 31004233417. The next prime is 31004233439. The reversal of 31004233421 is 12433240013.

It is a cyclic number.

It is not a de Polignac number, because 31004233421 - 2² = 31004233417 is a prime.

It is a super-2 number, since 2×31004233421² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31004233321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 820055 + ... + 857028.

It is an arithmetic number, because the mean of its divisors is an integer number (2347917600).

Almost surely, 2^31004233421 is an apocalyptic number.

It is an amenable number.

31004233421 is a deficient number, since it is larger than the sum of its proper divisors (6562448179).

31004233421 is a wasteful number, since it uses less digits than its factorization.

31004233421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1677248.

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

Adding to 31004233421 its reverse (12433240013), we get a palindrome (43437473434).

The spelling of 31004233421 in words is "thirty-one billion, four million, two hundred thirty-three thousand, four hundred twenty-one".