240631 has 2 divisors, whose sum is σ = 240632. Its totient is φ = 240630.

The previous prime is 240623. The next prime is 240641. The reversal of 240631 is 136042.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 240631 - 2³ = 240623 is a prime.

It is a super-2 number, since 2×240631² = 115806556322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120315 + 120316.

It is an arithmetic number, because the mean of its divisors is an integer number (120316).

2²⁴⁰⁶³¹ is an apocalyptic number.

240631 is a deficient number, since it is larger than the sum of its proper divisors (1).

240631 is an equidigital number, since it uses as much as digits as its factorization.

240631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 240631 is about 490.5415374869. The cubic root of 240631 is about 62.1990653389.

Adding to 240631 its reverse (136042), we get a palindrome (376673).

The spelling of 240631 in words is "two hundred forty thousand, six hundred thirty-one".