55542297 has 32 divisors (see below), whose sum is σ = 79478784. Its totient is φ = 34444800.

The previous prime is 55542271. The next prime is 55542299. The reversal of 55542297 is 79224555.

It is not a de Polignac number, because 55542297 - 2⁸ = 55542041 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (55542299) 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, 423922 + ... + 424052.

It is an arithmetic number, because the mean of its divisors is an integer number (2483712).

Almost surely, 2^55542297 is an apocalyptic number.

It is an amenable number.

55542297 is a deficient number, since it is larger than the sum of its proper divisors (23936487).

55542297 is a wasteful number, since it uses less digits than its factorization.

55542297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309.

The product of its digits is 126000, while the sum is 39.

The square root of 55542297 is about 7452.6704609824. The cubic root of 55542297 is about 381.5410572546.

The spelling of 55542297 in words is "fifty-five million, five hundred forty-two thousand, two hundred ninety-seven".