52521506 has 4 divisors (see below), whose sum is σ = 78782262. Its totient is φ = 26260752.

The previous prime is 52521493. The next prime is 52521509. The reversal of 52521506 is 60512525.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 35224225 + 17297281 = 5935^2 + 4159^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (52521509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13130375 + ... + 13130378.

Almost surely, 2^52521506 is an apocalyptic number.

52521506 is a deficient number, since it is larger than the sum of its proper divisors (26260756).

52521506 is a wasteful number, since it uses less digits than its factorization.

52521506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26260755.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 52521506 is about 7247.1722761364. The cubic root of 52521506 is about 374.4947411714.

The spelling of 52521506 in words is "fifty-two million, five hundred twenty-one thousand, five hundred six".