5215731 has 16 divisors (see below), whose sum is σ = 7216128. Its totient is φ = 3348800.

The previous prime is 5215729. The next prime is 5215739. The reversal of 5215731 is 1375125.

It is a cyclic number.

It is not a de Polignac number, because 5215731 - 2¹ = 5215729 is a prime.

It is a super-2 number, since 2×5215731² = 54407699728722, which contains 22 as substring.

5215731 is a modest number, since divided by 5731 gives 521 as remainder.

It is not an unprimeable number, because it can be changed into a prime (5215739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9751 + ... + 10271.

It is an arithmetic number, because the mean of its divisors is an integer number (451008).

Almost surely, 2^5215731 is an apocalyptic number.

5215731 is a deficient number, since it is larger than the sum of its proper divisors (2000397).

5215731 is a wasteful number, since it uses less digits than its factorization.

5215731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642.

The product of its digits is 1050, while the sum is 24.

The square root of 5215731 is about 2283.7974954010. The cubic root of 5215731 is about 173.4223478525.

Subtracting from 5215731 its reverse (1375125), we obtain a triangular number (3840606 = T₂₇₇₁).

The spelling of 5215731 in words is "five million, two hundred fifteen thousand, seven hundred thirty-one".