531000087 has 16 divisors (see below), whose sum is σ = 745762560. Its totient is φ = 335143872.

The previous prime is 531000079. The next prime is 531000097. The reversal of 531000087 is 780000135.

It is not a de Polignac number, because 531000087 - 2³ = 531000079 is a prime.

It is a super-2 number, since 2×531000087² = 563922184788015138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531000097) 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, 139078 + ... + 142844.

It is an arithmetic number, because the mean of its divisors is an integer number (46610160).

Almost surely, 2^531000087 is an apocalyptic number.

531000087 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

531000087 is a deficient number, since it is larger than the sum of its proper divisors (214762473).

531000087 is a wasteful number, since it uses less digits than its factorization.

531000087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6262.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 531000087 is about 23043.4391313450. The cubic root of 531000087 is about 809.7759310107.

The spelling of 531000087 in words is "five hundred thirty-one million, eighty-seven", and thus it is an aban number.