118222831 has 2 divisors, whose sum is σ = 118222832. Its totient is φ = 118222830.

The previous prime is 118222801. The next prime is 118222873. The reversal of 118222831 is 138222811.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 118222831 - 2⁹ = 118222319 is a prime.

It is a super-2 number, since 2×118222831² = 27953275539309122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 118222831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118222801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59111415 + 59111416.

It is an arithmetic number, because the mean of its divisors is an integer number (59111416).

Almost surely, 2^118222831 is an apocalyptic number.

118222831 is a deficient number, since it is larger than the sum of its proper divisors (1).

118222831 is an equidigital number, since it uses as much as digits as its factorization.

118222831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 28.

The square root of 118222831 is about 10873.0322817510. The cubic root of 118222831 is about 490.7953638338.

The spelling of 118222831 in words is "one hundred eighteen million, two hundred twenty-two thousand, eight hundred thirty-one".