553121400 has 96 divisors (see below), whose sum is σ = 1846600560. Its totient is φ = 136151040.

The previous prime is 553121389. The next prime is 553121417. The reversal of 553121400 is 4121355.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27657 + ... + 43256.

Almost surely, 2^553121400 is an apocalyptic number.

553121400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

553121400 is an abundant number, since it is smaller than the sum of its proper divisors (1293479160).

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

553121400 is a wasteful number, since it uses less digits than its factorization.

553121400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70945 (or 70936 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 553121400 is about 23518.5331175224. The cubic root of 553121400 is about 820.8683048880.

Adding to 553121400 its reverse (4121355), we get a palindrome (557242755).

The spelling of 553121400 in words is "five hundred fifty-three million, one hundred twenty-one thousand, four hundred".