240513631 has 4 divisors (see below), whose sum is σ = 240544872. Its totient is φ = 240482392.

The previous prime is 240513583. The next prime is 240513641. The reversal of 240513631 is 136315042.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 240513631 - 2¹⁷ = 240382559 is a prime.

It is a super-2 number, since 2×240513631² = 115693613393608322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 240513596 and 240513605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240513641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5016 + ... + 22498.

It is an arithmetic number, because the mean of its divisors is an integer number (60136218).

Almost surely, 2^240513631 is an apocalyptic number.

240513631 is a deficient number, since it is larger than the sum of its proper divisors (31241).

240513631 is a wasteful number, since it uses less digits than its factorization.

240513631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31240.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 240513631 is about 15508.5018941225. The cubic root of 240513631 is about 621.8895105694.

Adding to 240513631 its reverse (136315042), we get a palindrome (376828673).

The spelling of 240513631 in words is "two hundred forty million, five hundred thirteen thousand, six hundred thirty-one".