55500591 has 8 divisors (see below), whose sum is σ = 74265264. Its totient is φ = 36868160.

The previous prime is 55500527. The next prime is 55500607. The reversal of 55500591 is 19500555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55500591 - 2⁶ = 55500527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55500391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32076 + ... + 33761.

It is an arithmetic number, because the mean of its divisors is an integer number (9283158).

Almost surely, 2^55500591 is an apocalyptic number.

55500591 is a deficient number, since it is larger than the sum of its proper divisors (18764673).

55500591 is a wasteful number, since it uses less digits than its factorization.

55500591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66121.

The product of its (nonzero) digits is 5625, while the sum is 30.

The square root of 55500591 is about 7449.8718780929. The cubic root of 55500591 is about 381.4455352429.

The spelling of 55500591 in words is "fifty-five million, five hundred thousand, five hundred ninety-one".