87223725 has 36 divisors (see below), whose sum is σ = 157730976. Its totient is φ = 46071840.

The previous prime is 87223723. The next prime is 87223729. The reversal of 87223725 is 52732278.

It is a happy number.

It is not a de Polignac number, because 87223725 - 2¹ = 87223723 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87223725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87223723) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 22264 + ... + 25886.

It is an arithmetic number, because the mean of its divisors is an integer number (4381416).

Almost surely, 2^87223725 is an apocalyptic number.

It is an amenable number.

87223725 is a deficient number, since it is larger than the sum of its proper divisors (70507251).

87223725 is a wasteful number, since it uses less digits than its factorization.

87223725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3746 (or 3738 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 87223725 is about 9339.3642717264. The cubic root of 87223725 is about 443.4842593279.

The spelling of 87223725 in words is "eighty-seven million, two hundred twenty-three thousand, seven hundred twenty-five".