240517231 has 2 divisors, whose sum is σ = 240517232. Its totient is φ = 240517230.

The previous prime is 240517201. The next prime is 240517243. The reversal of 240517231 is 132715042.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 240517231 - 2¹³ = 240509039 is a prime.

It is a super-2 number, since 2×240517231² = 115697076815814722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 240517196 and 240517205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240517201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120258615 + 120258616.

It is an arithmetic number, because the mean of its divisors is an integer number (120258616).

Almost surely, 2^240517231 is an apocalyptic number.

240517231 is a deficient number, since it is larger than the sum of its proper divisors (1).

240517231 is an equidigital number, since it uses as much as digits as its factorization.

240517231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 240517231 is about 15508.6179590575. The cubic root of 240517231 is about 621.8926133611.

The spelling of 240517231 in words is "two hundred forty million, five hundred seventeen thousand, two hundred thirty-one".