240839531 has 2 divisors, whose sum is σ = 240839532. Its totient is φ = 240839530.

The previous prime is 240839513. The next prime is 240839539. The reversal of 240839531 is 135938042.

Together with previous prime (240839513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 240839531 - 2¹⁴ = 240823147 is a prime.

It is a super-2 number, since 2×240839531² = 116007359384599922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 240839491 and 240839500.

It is not a weakly prime, because it can be changed into another prime (240839539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120419765 + 120419766.

It is an arithmetic number, because the mean of its divisors is an integer number (120419766).

Almost surely, 2^240839531 is an apocalyptic number.

240839531 is a deficient number, since it is larger than the sum of its proper divisors (1).

240839531 is an equidigital number, since it uses as much as digits as its factorization.

240839531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 240839531 is about 15519.0054771561. The cubic root of 240839531 is about 622.1702740302.

The spelling of 240839531 in words is "two hundred forty million, eight hundred thirty-nine thousand, five hundred thirty-one".