55561051 has 12 divisors (see below), whose sum is σ = 69604752. Its totient is φ = 43959888.

The previous prime is 55561043. The next prime is 55561139. The reversal of 55561051 is 15016555.

It is not a de Polignac number, because 55561051 - 2³ = 55561043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55561001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42975 + ... + 44248.

It is an arithmetic number, because the mean of its divisors is an integer number (5800396).

Almost surely, 2^55561051 is an apocalyptic number.

55561051 is a deficient number, since it is larger than the sum of its proper divisors (14043701).

55561051 is a wasteful number, since it uses less digits than its factorization.

55561051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87250 (or 87243 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 28.

The square root of 55561051 is about 7453.9285615037. The cubic root of 55561051 is about 381.5839951967.

The spelling of 55561051 in words is "fifty-five million, five hundred sixty-one thousand, fifty-one".