87525819 has 16 divisors (see below), whose sum is σ = 129824640. Its totient is φ = 58280040.

The previous prime is 87525817. The next prime is 87525827. The reversal of 87525819 is 91852578.

It is a happy number.

It is not a de Polignac number, because 87525819 - 2¹ = 87525817 is a prime.

It is a super-2 number, since 2×87525819² = 15321537983241522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87525811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30684 + ... + 33414.

It is an arithmetic number, because the mean of its divisors is an integer number (8114040).

Almost surely, 2^87525819 is an apocalyptic number.

87525819 is a deficient number, since it is larger than the sum of its proper divisors (42298821).

87525819 is a wasteful number, since it uses less digits than its factorization.

87525819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3927 (or 3921 counting only the distinct ones).

The product of its digits is 201600, while the sum is 45.

The square root of 87525819 is about 9355.5234487441. The cubic root of 87525819 is about 443.9956628503.

The spelling of 87525819 in words is "eighty-seven million, five hundred twenty-five thousand, eight hundred nineteen".