55457507 has 4 divisors (see below), whose sum is σ = 63380016. Its totient is φ = 47535000.

The previous prime is 55457503. The next prime is 55457513. The reversal of 55457507 is 70575455.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55457507 - 2² = 55457503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55457503) 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, 3961244 + ... + 3961257.

It is an arithmetic number, because the mean of its divisors is an integer number (15845004).

Almost surely, 2^55457507 is an apocalyptic number.

55457507 is a deficient number, since it is larger than the sum of its proper divisors (7922509).

55457507 is an equidigital number, since it uses as much as digits as its factorization.

55457507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7922508.

The product of its (nonzero) digits is 122500, while the sum is 38.

The square root of 55457507 is about 7446.9797233509. The cubic root of 55457507 is about 381.3468068420.

The spelling of 55457507 in words is "fifty-five million, four hundred fifty-seven thousand, five hundred seven".