55193997 has 16 divisors (see below), whose sum is σ = 77944320. Its totient is φ = 34667952.

The previous prime is 55193987. The next prime is 55194011. The reversal of 55193997 is 79939155.

It is not a de Polignac number, because 55193997 - 2⁸ = 55193741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55193927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1347 + ... + 10592.

It is an arithmetic number, because the mean of its divisors is an integer number (4871520).

Almost surely, 2^55193997 is an apocalyptic number.

It is an amenable number.

55193997 is a deficient number, since it is larger than the sum of its proper divisors (22750323).

55193997 is a wasteful number, since it uses less digits than its factorization.

55193997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12032.

The product of its digits is 382725, while the sum is 48.

The square root of 55193997 is about 7429.2662490989. The cubic root of 55193997 is about 380.7418494999.

The spelling of 55193997 in words is "fifty-five million, one hundred ninety-three thousand, nine hundred ninety-seven".