118655531 has 2 divisors, whose sum is σ = 118655532. Its totient is φ = 118655530.

The previous prime is 118655521. The next prime is 118655561. The reversal of 118655531 is 135556811.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 118655531 - 2¹⁰ = 118654507 is a prime.

It is a super-2 number, since 2×118655531² = 28158270073783922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 118655491 and 118655500.

It is not a weakly prime, because it can be changed into another prime (118655521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59327765 + 59327766.

It is an arithmetic number, because the mean of its divisors is an integer number (59327766).

Almost surely, 2^118655531 is an apocalyptic number.

118655531 is a deficient number, since it is larger than the sum of its proper divisors (1).

118655531 is an equidigital number, since it uses as much as digits as its factorization.

118655531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18000, while the sum is 35.

The square root of 118655531 is about 10892.9119614546. The cubic root of 118655531 is about 491.3934112868.

The spelling of 118655531 in words is "one hundred eighteen million, six hundred fifty-five thousand, five hundred thirty-one".