55097587 has 4 divisors (see below), whose sum is σ = 57997480. Its totient is φ = 52197696.

The previous prime is 55097543. The next prime is 55097591. The reversal of 55097587 is 78579055.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78579055 = 5 ⋅15715811.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55097587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55097087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1449918 + ... + 1449955.

It is an arithmetic number, because the mean of its divisors is an integer number (14499370).

Almost surely, 2^55097587 is an apocalyptic number.

55097587 is a deficient number, since it is larger than the sum of its proper divisors (2899893).

55097587 is a wasteful number, since it uses less digits than its factorization.

55097587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2899892.

The product of its (nonzero) digits is 441000, while the sum is 46.

The square root of 55097587 is about 7422.7748854455. The cubic root of 55097587 is about 380.5200336184.

The spelling of 55097587 in words is "fifty-five million, ninety-seven thousand, five hundred eighty-seven".