13123231400 has 24 divisors (see below), whose sum is σ = 30511513470. Its totient is φ = 5249292480.

The previous prime is 13123231393. The next prime is 13123231403. The reversal of 13123231400 is 413232131.

It can be written as a sum of positive squares in 3 ways, for example, as 8874016804 + 4249214596 = 94202^2 + 65186^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (13123231403) 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, 32807879 + ... + 32808278.

Almost surely, 2^13123231400 is an apocalyptic number.

13123231400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13123231400 is an abundant number, since it is smaller than the sum of its proper divisors (17388282070).

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

13123231400 is a wasteful number, since it uses less digits than its factorization.

13123231400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65616173 (or 65616164 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 13123231400 its reverse (413232131), we get a palindrome (13536463531).

The spelling of 13123231400 in words is "thirteen billion, one hundred twenty-three million, two hundred thirty-one thousand, four hundred".