521545002 has 16 divisors (see below), whose sum is σ = 1137916512. Its totient is φ = 158043920.

The previous prime is 521544997. The next prime is 521545009. The reversal of 521545002 is 200545125.

It is a happy number.

It is a super-2 number, since 2×521545002² = 544018378222360008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (521545009) 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, 3951033 + ... + 3951164.

It is an arithmetic number, because the mean of its divisors is an integer number (71119782).

Almost surely, 2^521545002 is an apocalyptic number.

521545002 is an abundant number, since it is smaller than the sum of its proper divisors (616371510).

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

521545002 is a wasteful number, since it uses less digits than its factorization.

521545002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7902213.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 521545002 is about 22837.3597861049. The cubic root of 521545002 is about 804.9407782777.

The spelling of 521545002 in words is "five hundred twenty-one million, five hundred forty-five thousand, two".