55152009 has 48 divisors (see below), whose sum is σ = 92252160. Its totient is φ = 32639760.

The previous prime is 55152001. The next prime is 55152047. The reversal of 55152009 is 90025155.

It is not a de Polignac number, because 55152009 - 2³ = 55152001 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (55152001) 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, 125412 + ... + 125850.

It is an arithmetic number, because the mean of its divisors is an integer number (1921920).

Almost surely, 2^55152009 is an apocalyptic number.

It is an amenable number.

55152009 is a deficient number, since it is larger than the sum of its proper divisors (37100151).

55152009 is a wasteful number, since it uses less digits than its factorization.

55152009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512 (or 500 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 27.

The square root of 55152009 is about 7426.4398603907. The cubic root of 55152009 is about 380.6452771357.

The spelling of 55152009 in words is "fifty-five million, one hundred fifty-two thousand, nine".