87271731 has 12 divisors (see below), whose sum is σ = 132694120. Its totient is φ = 55118880.

The previous prime is 87271703. The next prime is 87271757. The reversal of 87271731 is 13717278.

It is a happy number.

It is not a de Polignac number, because 87271731 - 2¹¹ = 87269683 is a prime.

It is a super-2 number, since 2×87271731² = 15232710063472722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87271771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 255010 + ... + 255351.

Almost surely, 2^87271731 is an apocalyptic number.

87271731 is a deficient number, since it is larger than the sum of its proper divisors (45422389).

87271731 is a wasteful number, since it uses less digits than its factorization.

87271731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510386 (or 510383 counting only the distinct ones).

The product of its digits is 16464, while the sum is 36.

The square root of 87271731 is about 9341.9340074740. The cubic root of 87271731 is about 443.5656056998.

The spelling of 87271731 in words is "eighty-seven million, two hundred seventy-one thousand, seven hundred thirty-one".