16231400 has 24 divisors (see below), whose sum is σ = 37738470. Its totient is φ = 6492480.

The previous prime is 16231393. The next prime is 16231427. The reversal of 16231400 is 413261.

16231400 = T₁₁₂₇ + T₁₁₂₈ + ... + T₁₁₅₁.

It can be written as a sum of positive squares in 3 ways, for example, as 10876804 + 5354596 = 3298^2 + 2314^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40379 + ... + 40778.

Almost surely, 2^16231400 is an apocalyptic number.

16231400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16231400 is an abundant number, since it is smaller than the sum of its proper divisors (21507070).

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

16231400 is a wasteful number, since it uses less digits than its factorization.

16231400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81173 (or 81164 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 16231400 is about 4028.8211675377. The cubic root of 16231400 is about 253.1931742397.

Adding to 16231400 its reverse (413261), we get a palindrome (16644661).

The spelling of 16231400 in words is "sixteen million, two hundred thirty-one thousand, four hundred".