525215305 has 16 divisors (see below), whose sum is σ = 639993600. Its totient is φ = 413712000.

The previous prime is 525215303. The next prime is 525215359. The reversal of 525215305 is 503512525.

It is not a de Polignac number, because 525215305 - 2¹ = 525215303 is a prime.

It is a super-2 number, since 2×525215305² = 551702233212486050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (525215303) 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, 159930 + ... + 163180.

It is an arithmetic number, because the mean of its divisors is an integer number (39999600).

Almost surely, 2^525215305 is an apocalyptic number.

It is an amenable number.

525215305 is a deficient number, since it is larger than the sum of its proper divisors (114778295).

525215305 is a wasteful number, since it uses less digits than its factorization.

525215305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3744.

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 525215305 is about 22917.5763334607. The cubic root of 525215305 is about 806.8245870688.

The spelling of 525215305 in words is "five hundred twenty-five million, two hundred fifteen thousand, three hundred five".