519972621 has 16 divisors (see below), whose sum is σ = 801244800. Its totient is φ = 293787648.

The previous prime is 519972617. The next prime is 519972631. The reversal of 519972621 is 126279915.

It is not a de Polignac number, because 519972621 - 2² = 519972617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (519972631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137236 + ... + 140973.

It is an arithmetic number, because the mean of its divisors is an integer number (50077800).

Almost surely, 2^519972621 is an apocalyptic number.

It is an amenable number.

519972621 is a deficient number, since it is larger than the sum of its proper divisors (281272179).

519972621 is a wasteful number, since it uses less digits than its factorization.

519972621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278308.

The product of its digits is 68040, while the sum is 42.

The square root of 519972621 is about 22802.9081697927. The cubic root of 519972621 is about 804.1310382072.

The spelling of 519972621 in words is "five hundred nineteen million, nine hundred seventy-two thousand, six hundred twenty-one".