31421000640403 has 12 divisors (see below), whose sum is σ = 34537470935800. Its totient is φ = 28564266487680.

The previous prime is 31421000640397. The next prime is 31421000640479. The reversal of 31421000640403 is 30404600012413.

It is not a de Polignac number, because 31421000640403 - 2³⁷ = 31283561686931 is a prime.

It is a super-2 number, since 2×31421000640403² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31421000640493) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11688148 + ... + 14122846.

Almost surely, 2^{31421000640403} is an apocalyptic number.

31421000640403 is a deficient number, since it is larger than the sum of its proper divisors (3116470295397).

31421000640403 is a wasteful number, since it uses less digits than its factorization.

31421000640403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2541378 (or 2541367 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 31421000640403 its reverse (30404600012413), we get a palindrome (61825600652816).

The spelling of 31421000640403 in words is "thirty-one trillion, four hundred twenty-one billion, six hundred forty thousand, four hundred three".