87314931081 has 27 divisors (see below), whose sum is σ = 146723270733. Its totient is φ = 49890700440.

The previous prime is 87314931071. The next prime is 87314931107. The reversal of 87314931081 is 18013941378.

The square root of 87314931081 is 295491.

It is a perfect power (a square), and thus also a powerful number.

87314931081 is a `hidden beast` number, since 8 + 73 + 1 + 493 + 10 + 81 = 666.

It is not a de Polignac number, because 87314931081 - 2¹¹ = 87314929033 is a prime.

It is a super-2 number, since 2×87314931081² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87314931061) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 6198276 + ... + 6212346.

Almost surely, 2^87314931081 is an apocalyptic number.

87314931081 is the 295491-st square number.

87314931081 is the 147746-th centered octagonal number.

It is an amenable number.

87314931081 is a deficient number, since it is larger than the sum of its proper divisors (59408339652).

87314931081 is an frugal number, since it uses more digits than its factorization.

87314931081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28162 (or 14081 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 87314931081 in words is "eighty-seven billion, three hundred fourteen million, nine hundred thirty-one thousand, eighty-one".