118471531 has 2 divisors, whose sum is σ = 118471532. Its totient is φ = 118471530.

The previous prime is 118471519. The next prime is 118471541. The reversal of 118471531 is 135174811.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 118471531 - 2⁵ = 118471499 is a prime.

It is a super-2 number, since 2×118471531² = 28071007314967922, 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 = 118471493 and 118471502.

It is not a weakly prime, because it can be changed into another prime (118471511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59235765 + 59235766.

It is an arithmetic number, because the mean of its divisors is an integer number (59235766).

Almost surely, 2^118471531 is an apocalyptic number.

118471531 is a deficient number, since it is larger than the sum of its proper divisors (1).

118471531 is an equidigital number, since it uses as much as digits as its factorization.

118471531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 31.

The square root of 118471531 is about 10884.4628255142. The cubic root of 118471531 is about 491.1392774265.

The spelling of 118471531 in words is "one hundred eighteen million, four hundred seventy-one thousand, five hundred thirty-one".