55772750 has 64 divisors (see below), whose sum is σ = 120699072. Its totient is φ = 19072000.

The previous prime is 55772747. The next prime is 55772779. The reversal of 55772750 is 5727755.

It is a happy number.

It is a super-2 number, since 2×55772750² = 6221199285125000, 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 31 ways as a sum of consecutive naturals, for example, 46154 + ... + 47346.

It is an arithmetic number, because the mean of its divisors is an integer number (1885923).

Almost surely, 2^55772750 is an apocalyptic number.

55772750 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55772750 is an abundant number, since it is smaller than the sum of its proper divisors (64926322).

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

55772750 is a wasteful number, since it uses less digits than its factorization.

55772750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238 (or 1228 counting only the distinct ones).

The product of its (nonzero) digits is 85750, while the sum is 38.

The square root of 55772750 is about 7468.1155588274. The cubic root of 55772750 is about 382.0680187350.

The spelling of 55772750 in words is "fifty-five million, seven hundred seventy-two thousand, seven hundred fifty".