55861937 has 4 divisors (see below), whose sum is σ = 56288496. Its totient is φ = 55435380.

The previous prime is 55861931. The next prime is 55861943. The reversal of 55861937 is 73916855.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73916855 = 5 ⋅14783371.

It is an interprime number because it is at equal distance from previous prime (55861931) and next prime (55861943).

It is a cyclic number.

It is not a de Polignac number, because 55861937 - 2⁴ = 55861921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55861931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213083 + ... + 213344.

It is an arithmetic number, because the mean of its divisors is an integer number (14072124).

Almost surely, 2^55861937 is an apocalyptic number.

It is an amenable number.

55861937 is a deficient number, since it is larger than the sum of its proper divisors (426559).

55861937 is a wasteful number, since it uses less digits than its factorization.

55861937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426558.

The product of its digits is 226800, while the sum is 44.

The square root of 55861937 is about 7474.0843586355. The cubic root of 55861937 is about 382.2715670805.

The spelling of 55861937 in words is "fifty-five million, eight hundred sixty-one thousand, nine hundred thirty-seven".