513661242 has 16 divisors (see below), whose sum is σ = 1028160000. Its totient is φ = 171080832.

The previous prime is 513661237. The next prime is 513661249. The reversal of 513661242 is 242166315.

It is not an unprimeable number, because it can be changed into a prime (513661249) 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, 26778 + ... + 41765.

It is an arithmetic number, because the mean of its divisors is an integer number (64260000).

Almost surely, 2^513661242 is an apocalyptic number.

513661242 is an abundant number, since it is smaller than the sum of its proper divisors (514498758).

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

513661242 is a wasteful number, since it uses less digits than its factorization.

513661242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69797.

The product of its digits is 8640, while the sum is 30.

The square root of 513661242 is about 22664.0958787241. The cubic root of 513661242 is about 800.8642961124.

The spelling of 513661242 in words is "five hundred thirteen million, six hundred sixty-one thousand, two hundred forty-two".