531275551 has 32 divisors (see below), whose sum is σ = 618098688. Its totient is φ = 453573120.

The previous prime is 531275533. The next prime is 531275573. The reversal of 531275551 is 155572135.

It is a cyclic number.

It is not a de Polignac number, because 531275551 - 2⁵ = 531275519 is a prime.

It is a super-2 number, since 2×531275551² = 564507422180707202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531275351) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 642000 + ... + 642826.

It is an arithmetic number, because the mean of its divisors is an integer number (19315584).

Almost surely, 2^531275551 is an apocalyptic number.

531275551 is a deficient number, since it is larger than the sum of its proper divisors (86823137).

531275551 is a wasteful number, since it uses less digits than its factorization.

531275551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951.

The product of its digits is 26250, while the sum is 34.

The square root of 531275551 is about 23049.4154155805. The cubic root of 531275551 is about 809.9159344753.

The spelling of 531275551 in words is "five hundred thirty-one million, two hundred seventy-five thousand, five hundred fifty-one".