55159965 has 48 divisors (see below), whose sum is σ = 111960576. Its totient is φ = 24595200.

The previous prime is 55159963. The next prime is 55159981. The reversal of 55159965 is 56995155.

55159965 is a `hidden beast` number, since 5 + 51 + 599 + 6 + 5 = 666.

It is not a de Polignac number, because 55159965 - 2¹ = 55159963 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55159965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55159963) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10780 + ... + 15050.

It is an arithmetic number, because the mean of its divisors is an integer number (2332512).

Almost surely, 2^55159965 is an apocalyptic number.

It is an amenable number.

55159965 is an abundant number, since it is smaller than the sum of its proper divisors (56800611).

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

55159965 is a wasteful number, since it uses less digits than its factorization.

55159965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4330 (or 4327 counting only the distinct ones).

The product of its digits is 303750, while the sum is 45.

The square root of 55159965 is about 7426.9754947758. The cubic root of 55159965 is about 380.6635796918.

It can be divided in two parts, 551 and 59965, that added together give a square (60516 = 246²).

The spelling of 55159965 in words is "fifty-five million, one hundred fifty-nine thousand, nine hundred sixty-five".