51556101 has 16 divisors (see below), whose sum is σ = 72542400. Its totient is φ = 32479488.

The previous prime is 51556093. The next prime is 51556103. The reversal of 51556101 is 10165515.

It is not a de Polignac number, because 51556101 - 2³ = 51556093 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51556103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28125 + ... + 29901.

It is an arithmetic number, because the mean of its divisors is an integer number (4533900).

Almost surely, 2^51556101 is an apocalyptic number.

It is an amenable number.

51556101 is a deficient number, since it is larger than the sum of its proper divisors (20986299).

51556101 is a wasteful number, since it uses less digits than its factorization.

51556101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2308.

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 51556101 is about 7180.2577251795. The cubic root of 51556101 is about 372.1859906451.

It can be divided in two parts, 515 and 56101, that added together give a triangular number (56616 = T₃₃₆).

The spelling of 51556101 in words is "fifty-one million, five hundred fifty-six thousand, one hundred one".