526213540 has 24 divisors (see below), whose sum is σ = 1105510392. Its totient is φ = 210397440.

The previous prime is 526213487. The next prime is 526213547. The reversal of 526213540 is 45312625.

It can be written as a sum of positive squares in 4 ways, for example, as 281165824 + 245047716 = 16768^2 + 15654^2 .

It is a junction number, because it is equal to n+sod(n) for n = 526213499 and 526213508.

It is not an unprimeable number, because it can be changed into a prime (526213547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66600 + ... + 74080.

It is an arithmetic number, because the mean of its divisors is an integer number (46062933).

Almost surely, 2^526213540 is an apocalyptic number.

It is an amenable number.

526213540 is an abundant number, since it is smaller than the sum of its proper divisors (579296852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

526213540 is a wasteful number, since it uses less digits than its factorization.

526213540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11007 (or 11005 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 526213540 is about 22939.3448031978. The cubic root of 526213540 is about 807.3354193685.

The spelling of 526213540 in words is "five hundred twenty-six million, two hundred thirteen thousand, five hundred forty".