243136465 has 64 divisors (see below), whose sum is σ = 368831232. Its totient is φ = 151142400.

The previous prime is 243136451. The next prime is 243136489. The reversal of 243136465 is 564631342.

It is not a de Polignac number, because 243136465 - 2⁵ = 243136433 is a prime.

It is a super-2 number, since 2×243136465² = 118230681225392450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 243136465.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1008745 + ... + 1008985.

It is an arithmetic number, because the mean of its divisors is an integer number (5762988).

Almost surely, 2^243136465 is an apocalyptic number.

It is an amenable number.

243136465 is a deficient number, since it is larger than the sum of its proper divisors (125694767).

243136465 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (243136464) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (370).

243136465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370.

The product of its digits is 51840, while the sum is 34.

The square root of 243136465 is about 15592.8337706781. The cubic root of 243136465 is about 624.1419393101.

The spelling of 243136465 in words is "two hundred forty-three million, one hundred thirty-six thousand, four hundred sixty-five".