228515525 has 12 divisors (see below), whose sum is σ = 323839392. Its totient is φ = 156696240.

The previous prime is 228515519. The next prime is 228515531. The reversal of 228515525 is 525515822.

It is an interprime number because it is at equal distance from previous prime (228515519) and next prime (228515531).

It is not a de Polignac number, because 228515525 - 2⁶ = 228515461 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 652727 + ... + 653076.

It is an arithmetic number, because the mean of its divisors is an integer number (26986616).

Almost surely, 2^228515525 is an apocalyptic number.

228515525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

228515525 is a deficient number, since it is larger than the sum of its proper divisors (95323867).

228515525 is a wasteful number, since it uses less digits than its factorization.

228515525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305820 (or 1305815 counting only the distinct ones).

The product of its digits is 40000, while the sum is 35.

The square root of 228515525 is about 15116.7299704665. The cubic root of 228515525 is about 611.3715666334.

The spelling of 228515525 in words is "two hundred twenty-eight million, five hundred fifteen thousand, five hundred twenty-five".