55523997 has 6 divisors (see below), whose sum is σ = 80201342. Its totient is φ = 37015992.

The previous prime is 55523987. The next prime is 55523999. The reversal of 55523997 is 79932555.

55523997 is a `hidden beast` number, since 5 + 552 + 3 + 9 + 97 = 666.

It can be written as a sum of positive squares in only one way, i.e., 35354916 + 20169081 = 5946^2 + 4491^2 .

It is not a de Polignac number, because 55523997 - 2⁷ = 55523869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55523999) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3084658 + ... + 3084675.

Almost surely, 2^55523997 is an apocalyptic number.

It is an amenable number.

55523997 is a deficient number, since it is larger than the sum of its proper divisors (24677345).

55523997 is a wasteful number, since it uses less digits than its factorization.

55523997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6169339 (or 6169336 counting only the distinct ones).

The product of its digits is 425250, while the sum is 45.

The square root of 55523997 is about 7451.4426120047. The cubic root of 55523997 is about 381.4991494433.

The spelling of 55523997 in words is "fifty-five million, five hundred twenty-three thousand, nine hundred ninety-seven".