55775900 has 18 divisors (see below), whose sum is σ = 121033920. Its totient is φ = 22310320.

The previous prime is 55775891. The next prime is 55775921. The reversal of 55775900 is 957755.

It is a super-2 number, since 2×55775900² = 6221902041620000, which contains 22 as substring.

It is a congruent number.

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, 278780 + ... + 278979.

Almost surely, 2^55775900 is an apocalyptic number.

55775900 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55775900 is an abundant number, since it is smaller than the sum of its proper divisors (65258020).

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

55775900 is a wasteful number, since it uses less digits than its factorization.

55775900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557773 (or 557766 counting only the distinct ones).

The product of its (nonzero) digits is 55125, while the sum is 38.

The square root of 55775900 is about 7468.3264524256. The cubic root of 55775900 is about 382.0752115643.

The spelling of 55775900 in words is "fifty-five million, seven hundred seventy-five thousand, nine hundred".