55415547 has 24 divisors (see below), whose sum is σ = 87971520. Its totient is φ = 33335280.

The previous prime is 55415537. The next prime is 55415557. The reversal of 55415547 is 74551455.

It is an interprime number because it is at equal distance from previous prime (55415537) and next prime (55415557).

It is not a de Polignac number, because 55415547 - 2⁶ = 55415483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55415537) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11748 + ... + 15774.

It is an arithmetic number, because the mean of its divisors is an integer number (3665480).

Almost surely, 2^55415547 is an apocalyptic number.

55415547 is a deficient number, since it is larger than the sum of its proper divisors (32555973).

55415547 is a wasteful number, since it uses less digits than its factorization.

55415547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4183 (or 4180 counting only the distinct ones).

The product of its digits is 70000, while the sum is 36.

The square root of 55415547 is about 7444.1619407426. The cubic root of 55415547 is about 381.2506049619.

The spelling of 55415547 in words is "fifty-five million, four hundred fifteen thousand, five hundred forty-seven".