5515231 has 4 divisors (see below), whose sum is σ = 5557464. Its totient is φ = 5473000.

The previous prime is 5515219. The next prime is 5515243. The reversal of 5515231 is 1325155.

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

It is an interprime number because it is at equal distance from previous prime (5515219) and next prime (5515243).

It is a cyclic number.

It is not a de Polignac number, because 5515231 - 2⁵ = 5515199 is a prime.

It is a super-2 number, since 2×5515231² = 60835545966722, which contains 22 as substring.

It is a Duffinian number.

5515231 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5515271) 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, 20920 + ... + 21181.

It is an arithmetic number, because the mean of its divisors is an integer number (1389366).

Almost surely, 2^5515231 is an apocalyptic number.

5515231 is a deficient number, since it is larger than the sum of its proper divisors (42233).

5515231 is a wasteful number, since it uses less digits than its factorization.

5515231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42232.

The product of its digits is 750, while the sum is 22.

The square root of 5515231 is about 2348.4528949928. The cubic root of 5515231 is about 176.6802082101.

The spelling of 5515231 in words is "five million, five hundred fifteen thousand, two hundred thirty-one".