118430531 has 2 divisors, whose sum is σ = 118430532. Its totient is φ = 118430530.

The previous prime is 118430491. The next prime is 118430537. The reversal of 118430531 is 135034811.

It is a strong prime.

It is an emirp because it is prime and its reverse (135034811) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118430531 is a prime.

It is a super-2 number, since 2×118430531² = 28051581345883922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 118430531.

It is not a weakly prime, because it can be changed into another prime (118430537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59215265 + 59215266.

It is an arithmetic number, because the mean of its divisors is an integer number (59215266).

Almost surely, 2^118430531 is an apocalyptic number.

118430531 is a deficient number, since it is larger than the sum of its proper divisors (1).

118430531 is an equidigital number, since it uses as much as digits as its factorization.

118430531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 118430531 is about 10882.5792439109. The cubic root of 118430531 is about 491.0826139294.

The spelling of 118430531 in words is "one hundred eighteen million, four hundred thirty thousand, five hundred thirty-one".