90381525 has 24 divisors (see below), whose sum is σ = 160927200. Its totient is φ = 44495040.

The previous prime is 90381521. The next prime is 90381527. The reversal of 90381525 is 52518309.

It is not a de Polignac number, because 90381525 - 2² = 90381521 is a prime.

It is a super-2 number, since 2×90381525² = 16337640122651250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90381521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45375 + ... + 47324.

It is an arithmetic number, because the mean of its divisors is an integer number (6705300).

Almost surely, 2^90381525 is an apocalyptic number.

It is an amenable number.

90381525 is a deficient number, since it is larger than the sum of its proper divisors (70545675).

90381525 is a wasteful number, since it uses less digits than its factorization.

90381525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92725 (or 92720 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 90381525 is about 9506.9198481948. The cubic root of 90381525 is about 448.7728293308.

It can be divided in two parts, 903815 and 25, that added together give a triangular number (903840 = T₁₃₄₄).

The spelling of 90381525 in words is "ninety million, three hundred eighty-one thousand, five hundred twenty-five".