239981517145 has 32 divisors (see below), whose sum is σ = 295886131200. Its totient is φ = 186751449024.

The previous prime is 239981517137. The next prime is 239981517197. The reversal of 239981517145 is 541715189932.

It is a cyclic number.

It is not a de Polignac number, because 239981517145 - 2³ = 239981517137 is a prime.

It is a super-2 number, since 2×239981517145² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57978486 + ... + 57982624.

It is an arithmetic number, because the mean of its divisors is an integer number (9246441600).

Almost surely, 2^239981517145 is an apocalyptic number.

It is an amenable number.

239981517145 is a deficient number, since it is larger than the sum of its proper divisors (55904614055).

239981517145 is a wasteful number, since it uses less digits than its factorization.

239981517145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5229.

The product of its digits is 2721600, while the sum is 55.

The spelling of 239981517145 in words is "two hundred thirty-nine billion, nine hundred eighty-one million, five hundred seventeen thousand, one hundred forty-five".