87265817231 has 4 divisors (see below), whose sum is σ = 91858755000. Its totient is φ = 82672879464.

The previous prime is 87265817203. The next prime is 87265817363. The reversal of 87265817231 is 13271856278.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13271856278 = 2 ⋅6635928139.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87265817231 is a prime.

It is a super-2 number, since 2×87265817231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87265817231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87265817201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2296468856 + ... + 2296468893.

It is an arithmetic number, because the mean of its divisors is an integer number (22964688750).

Almost surely, 2^87265817231 is an apocalyptic number.

87265817231 is a deficient number, since it is larger than the sum of its proper divisors (4592937769).

87265817231 is a wasteful number, since it uses less digits than its factorization.

87265817231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4592937768.

The product of its digits is 1128960, while the sum is 50.

The spelling of 87265817231 in words is "eighty-seven billion, two hundred sixty-five million, eight hundred seventeen thousand, two hundred thirty-one".