87518347225 has 9 divisors (see below), whose sum is σ = 108524584767. Its totient is φ = 70013494440.

The previous prime is 87518347211. The next prime is 87518347307. The reversal of 87518347225 is 52274381578.

It is a happy number.

The square root of 87518347225 is 295835.

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

It can be written as a sum of positive squares in only one way, i.e., 31506605001 + 56011742224 = 177501^2 + 236668^2 .

It is not a de Polignac number, because 87518347225 - 2¹³ = 87518339033 is a prime.

It is a super-2 number, since 2×87518347225² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1449592 + ... + 1508758.

Almost surely, 2^87518347225 is an apocalyptic number.

87518347225 is the 295835-th square number.

87518347225 is the 147918-th centered octagonal number.

It is an amenable number.

87518347225 is a deficient number, since it is larger than the sum of its proper divisors (21006237542).

87518347225 is an frugal number, since it uses more digits than its factorization.

87518347225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118344 (or 59172 counting only the distinct ones).

The product of its digits is 3763200, while the sum is 52.

The spelling of 87518347225 in words is "eighty-seven billion, five hundred eighteen million, three hundred forty-seven thousand, two hundred twenty-five".