5155531 has 4 divisors (see below), whose sum is σ = 5160600. Its totient is φ = 5150464.

The previous prime is 5155511. The next prime is 5155547. The reversal of 5155531 is 1355515.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 5155531 - 2⁵ = 5155499 is a prime.

It is a super-2 number, since 2×5155531² = 53158999783922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5155496 and 5155505.

It is not an unprimeable number, because it can be changed into a prime (5155511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 421 + ... + 3238.

It is an arithmetic number, because the mean of its divisors is an integer number (1290150).

Almost surely, 2^5155531 is an apocalyptic number.

5155531 is a deficient number, since it is larger than the sum of its proper divisors (5069).

5155531 is a wasteful number, since it uses less digits than its factorization.

5155531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5068.

The product of its digits is 1875, while the sum is 25.

The square root of 5155531 is about 2270.5794414642. The cubic root of 5155531 is about 172.7525503256.

The spelling of 5155531 in words is "five million, one hundred fifty-five thousand, five hundred thirty-one".