625527521 has 4 divisors (see below), whose sum is σ = 626388672. Its totient is φ = 624666372.

The previous prime is 625527509. The next prime is 625527533. The reversal of 625527521 is 125725526.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (625527509) and next prime (625527533).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-625527521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (625527421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 429485 + ... + 430938.

It is an arithmetic number, because the mean of its divisors is an integer number (156597168).

Almost surely, 2^625527521 is an apocalyptic number.

It is an amenable number.

625527521 is a deficient number, since it is larger than the sum of its proper divisors (861151).

625527521 is an equidigital number, since it uses as much as digits as its factorization.

625527521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861150.

The product of its digits is 42000, while the sum is 35.

The square root of 625527521 is about 25010.5481947118. The cubic root of 625527521 is about 855.2284518861.

The spelling of 625527521 in words is "six hundred twenty-five million, five hundred twenty-seven thousand, five hundred twenty-one".