213013525 has 12 divisors (see below), whose sum is σ = 268468804. Its totient is φ = 167616000.

The previous prime is 213013517. The next prime is 213013543. The reversal of 213013525 is 525310312.

It can be written as a sum of positive squares in 6 ways, for example, as 81613156 + 131400369 = 9034^2 + 11463^2 .

It is not a de Polignac number, because 213013525 - 2³ = 213013517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213013496 and 213013505.

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, 68316 + ... + 71365.

Almost surely, 2^213013525 is an apocalyptic number.

213013525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213013525 is a deficient number, since it is larger than the sum of its proper divisors (55455279).

213013525 is a wasteful number, since it uses less digits than its factorization.

213013525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139752 (or 139747 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 213013525 is about 14594.9828708361. The cubic root of 213013525 is about 597.2219021772.

Adding to 213013525 its reverse (525310312), we get a palindrome (738323837).

The spelling of 213013525 in words is "two hundred thirteen million, thirteen thousand, five hundred twenty-five".