521415002 has 8 divisors (see below), whose sum is σ = 782222196. Its totient is φ = 260674272.

The previous prime is 521415001. The next prime is 521415017. The reversal of 521415002 is 200514125.

It can be written as a sum of positive squares in 2 ways, for example, as 519338521 + 2076481 = 22789^2 + 1441^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (521415001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15128 + ... + 35660.

Almost surely, 2^521415002 is an apocalyptic number.

521415002 is a deficient number, since it is larger than the sum of its proper divisors (260807194).

521415002 is a wasteful number, since it uses less digits than its factorization.

521415002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33232.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 521415002 is about 22834.5133952970. The cubic root of 521415002 is about 804.8738930321.

Adding to 521415002 its reverse (200514125), we get a palindrome (721929127).

The spelling of 521415002 in words is "five hundred twenty-one million, four hundred fifteen thousand, two".