521377325 has 12 divisors (see below), whose sum is σ = 738866400. Its totient is φ = 357515760.

The previous prime is 521377319. The next prime is 521377331. The reversal of 521377325 is 523773125.

It is an interprime number because it is at equal distance from previous prime (521377319) and next prime (521377331).

It is not a de Polignac number, because 521377325 - 2⁶ = 521377261 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

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, 1489475 + ... + 1489824.

It is an arithmetic number, because the mean of its divisors is an integer number (61572200).

Almost surely, 2^521377325 is an apocalyptic number.

It is an amenable number.

521377325 is a deficient number, since it is larger than the sum of its proper divisors (217489075).

521377325 is a wasteful number, since it uses less digits than its factorization.

521377325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2979316 (or 2979311 counting only the distinct ones).

The product of its digits is 44100, while the sum is 35.

The square root of 521377325 is about 22833.6883792347. The cubic root of 521377325 is about 804.8545060665.

The spelling of 521377325 in words is "five hundred twenty-one million, three hundred seventy-seven thousand, three hundred twenty-five".