31431323413400 has 24 divisors (see below), whose sum is σ = 73077826936620. Its totient is φ = 12572529365280.

The previous prime is 31431323413379. The next prime is 31431323413409. The reversal of 31431323413400 is 431432313413.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31431323413409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78578308334 + ... + 78578308733.

Almost surely, 2^{31431323413400} is an apocalyptic number.

It is an amenable number.

31431323413400 is an abundant number, since it is smaller than the sum of its proper divisors (41646503523220).

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

31431323413400 is a wasteful number, since it uses less digits than its factorization.

31431323413400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157156617083 (or 157156617074 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 32.

Adding to 31431323413400 its reverse (431432313413), we get a palindrome (31862755726813).

The spelling of 31431323413400 in words is "thirty-one trillion, four hundred thirty-one billion, three hundred twenty-three million, four hundred thirteen thousand, four hundred".