2647531 has 2 divisors, whose sum is σ = 2647532. Its totient is φ = 2647530.

The previous prime is 2647499. The next prime is 2647537. The reversal of 2647531 is 1357462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2647531 - 2⁵ = 2647499 is a prime.

It is a super-2 number, since 2×2647531² = 14018840791922, which contains 22 as substring.

It is equal to p₁₉₃₀₈₇ and since 2647531 and 193087 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2647531.

It is not a weakly prime, because it can be changed into another prime (2647537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1323765 + 1323766.

It is an arithmetic number, because the mean of its divisors is an integer number (1323766).

2^2647531 is an apocalyptic number.

2647531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2647531 is an equidigital number, since it uses as much as digits as its factorization.

2647531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 28.

The square root of 2647531 is about 1627.1235355682. The cubic root of 2647531 is about 138.3397600279.

The spelling of 2647531 in words is "two million, six hundred forty-seven thousand, five hundred thirty-one".