51553755 has 24 divisors (see below), whose sum is σ = 97484400. Its totient is φ = 24995520.

The previous prime is 51553729. The next prime is 51553757. The reversal of 51553755 is 55735515.

51553755 is a `hidden beast` number, since 51 + 553 + 7 + 55 = 666.

It is not a de Polignac number, because 51553755 - 2⁷ = 51553627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51553757) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51580 + ... + 52569.

It is an arithmetic number, because the mean of its divisors is an integer number (4061850).

Almost surely, 2^51553755 is an apocalyptic number.

51553755 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51553755 is a deficient number, since it is larger than the sum of its proper divisors (45930645).

51553755 is a wasteful number, since it uses less digits than its factorization.

51553755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104171 (or 104168 counting only the distinct ones).

The product of its digits is 65625, while the sum is 36.

The square root of 51553755 is about 7180.0943587115. The cubic root of 51553755 is about 372.1803452636.

The spelling of 51553755 in words is "fifty-one million, five hundred fifty-three thousand, seven hundred fifty-five".