11312031400 has 48 divisors (see below), whose sum is σ = 26331350400. Its totient is φ = 4519500480.

The previous prime is 11312031397. The next prime is 11312031407. The reversal of 11312031400 is 413021311.

It is not an unprimeable number, because it can be changed into a prime (11312031407) 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, 139831 + ... + 205369.

It is an arithmetic number, because the mean of its divisors is an integer number (548569800).

Almost surely, 2^11312031400 is an apocalyptic number.

11312031400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11312031400 is an abundant number, since it is smaller than the sum of its proper divisors (15019319000).

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

11312031400 is a wasteful number, since it uses less digits than its factorization.

11312031400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66418 (or 66409 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 11312031400 its reverse (413021311), we get a palindrome (11725052711).

The spelling of 11312031400 in words is "eleven billion, three hundred twelve million, thirty-one thousand, four hundred".