240431661 has 24 divisors (see below), whose sum is σ = 361015200. Its totient is φ = 154058976.

The previous prime is 240431657. The next prime is 240431671. The reversal of 240431661 is 166134042.

240431661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 240431661 - 2² = 240431657 is a prime.

It is a super-2 number, since 2×240431661² = 115614767222437842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240431621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23290 + ... + 31988.

It is an arithmetic number, because the mean of its divisors is an integer number (15042300).

Almost surely, 2^240431661 is an apocalyptic number.

It is an amenable number.

240431661 is a deficient number, since it is larger than the sum of its proper divisors (120583539).

240431661 is a wasteful number, since it uses less digits than its factorization.

240431661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8825 (or 8822 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 240431661 is about 15505.8589249354. The cubic root of 240431661 is about 621.8188533469.

The spelling of 240431661 in words is "two hundred forty million, four hundred thirty-one thousand, six hundred sixty-one".