31433400400 has 30 divisors (see below), whose sum is σ = 75518745422. Its totient is φ = 12573360000.

The previous prime is 31433400389. The next prime is 31433400403. The reversal of 31433400400 is 400433413.

It can be written as a sum of positive squares in 3 ways, for example, as 7049953296 + 24383447104 = 83964^2 + 156152^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31433400403) 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, 39291351 + ... + 39292150.

Almost surely, 2^31433400400 is an apocalyptic number.

It is an amenable number.

31433400400 is an abundant number, since it is smaller than the sum of its proper divisors (44085345022).

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

31433400400 is a wasteful number, since it uses less digits than its factorization.

31433400400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78583519 (or 78583508 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 31433400400 its reverse (400433413), we get a palindrome (31833833813).

The spelling of 31433400400 in words is "thirty-one billion, four hundred thirty-three million, four hundred thousand, four hundred".