55188497 has 24 divisors (see below), whose sum is σ = 69967296. Its totient is φ = 42389568.

The previous prime is 55188493. The next prime is 55188499. The reversal of 55188497 is 79488155.

It is not a de Polignac number, because 55188497 - 2² = 55188493 is a prime.

It is a super-2 number, since 2×55188497² = 6091540402238018, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55188491) 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, 124358 + ... + 124800.

It is an arithmetic number, because the mean of its divisors is an integer number (2915304).

Almost surely, 2^55188497 is an apocalyptic number.

It is an amenable number.

55188497 is a deficient number, since it is larger than the sum of its proper divisors (14778799).

55188497 is a wasteful number, since it uses less digits than its factorization.

55188497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537 (or 500 counting only the distinct ones).

The product of its digits is 403200, while the sum is 47.

The square root of 55188497 is about 7428.8960821915. The cubic root of 55188497 is about 380.7292022928.

The spelling of 55188497 in words is "fifty-five million, one hundred eighty-eight thousand, four hundred ninety-seven".