240561031 has 4 divisors (see below), whose sum is σ = 241051464. Its totient is φ = 240070600.

The previous prime is 240561029. The next prime is 240561043. The reversal of 240561031 is 130165042.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 240561031 - 2¹ = 240561029 is a prime.

It is a super-2 number, since 2×240561031² = 115739219271565922, 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 = 240560993 and 240561011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240561001) 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, 244480 + ... + 245461.

It is an arithmetic number, because the mean of its divisors is an integer number (60262866).

Almost surely, 2^240561031 is an apocalyptic number.

240561031 is a deficient number, since it is larger than the sum of its proper divisors (490433).

240561031 is an equidigital number, since it uses as much as digits as its factorization.

240561031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490432.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 240561031 is about 15510.0300128659. The cubic root of 240561031 is about 621.9303615133.

It can be divided in two parts, 2405 and 61031, that added together give a palindrome (63436).

The spelling of 240561031 in words is "two hundred forty million, five hundred sixty-one thousand, thirty-one".