5215591 has 4 divisors (see below), whose sum is σ = 5242000. Its totient is φ = 5189184.

The previous prime is 5215579. The next prime is 5215597. The reversal of 5215591 is 1955125.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5215591 - 2⁵ = 5215559 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5215597) 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, 12906 + ... + 13303.

It is an arithmetic number, because the mean of its divisors is an integer number (1310500).

Almost surely, 2^5215591 is an apocalyptic number.

5215591 is a deficient number, since it is larger than the sum of its proper divisors (26409).

5215591 is a wasteful number, since it uses less digits than its factorization.

5215591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26408.

The product of its digits is 2250, while the sum is 28.

The square root of 5215591 is about 2283.7668444918. The cubic root of 5215591 is about 173.4207961783.

The spelling of 5215591 in words is "five million, two hundred fifteen thousand, five hundred ninety-one".