53561400 has 48 divisors (see below), whose sum is σ = 166042200. Its totient is φ = 14282880.

The previous prime is 53561371. The next prime is 53561423. The reversal of 53561400 is 416535.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44035 + ... + 45234.

Almost surely, 2^53561400 is an apocalyptic number.

53561400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

53561400 is an abundant number, since it is smaller than the sum of its proper divisors (112480800).

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

53561400 is a wasteful number, since it uses less digits than its factorization.

53561400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89288 (or 89279 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 53561400 is about 7318.5654331980. The cubic root of 53561400 is about 376.9501959364.

Adding to 53561400 its reverse (416535), we get a palindrome (53977935).

The spelling of 53561400 in words is "fifty-three million, five hundred sixty-one thousand, four hundred".