55005237 has 32 divisors (see below), whose sum is σ = 94306560. Its totient is φ = 31422816.

The previous prime is 55005229. The next prime is 55005239. The reversal of 55005237 is 73250055.

It is not a de Polignac number, because 55005237 - 2³ = 55005229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 55005237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55005239) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13513 + ... + 17105.

It is an arithmetic number, because the mean of its divisors is an integer number (2947080).

Almost surely, 2^55005237 is an apocalyptic number.

It is an amenable number.

55005237 is a deficient number, since it is larger than the sum of its proper divisors (39301323).

55005237 is an frugal number, since it uses more digits than its factorization.

55005237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3621 (or 3603 counting only the distinct ones).

The product of its (nonzero) digits is 5250, while the sum is 27.

The square root of 55005237 is about 7416.5515571592. The cubic root of 55005237 is about 380.3073160337.

The spelling of 55005237 in words is "fifty-five million, five thousand, two hundred thirty-seven".