525550405 has 16 divisors (see below), whose sum is σ = 648730224. Its totient is φ = 408430080.

The previous prime is 525550357. The next prime is 525550451. The reversal of 525550405 is 504055525.

It can be written as a sum of positive squares in 8 ways, for example, as 17994564 + 507555841 = 4242^2 + 22529^2 .

It is not a de Polignac number, because 525550405 - 2¹⁷ = 525419333 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 138919 + ... + 142651.

It is an arithmetic number, because the mean of its divisors is an integer number (40545639).

Almost surely, 2^525550405 is an apocalyptic number.

It is an amenable number.

525550405 is a deficient number, since it is larger than the sum of its proper divisors (123179819).

525550405 is a wasteful number, since it uses less digits than its factorization.

525550405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4536.

The product of its (nonzero) digits is 25000, while the sum is 31.

The square root of 525550405 is about 22924.8861502080. The cubic root of 525550405 is about 806.9961417543.

The spelling of 525550405 in words is "five hundred twenty-five million, five hundred fifty thousand, four hundred five".