231197651 has 2 divisors, whose sum is σ = 231197652. Its totient is φ = 231197650.

The previous prime is 231197621. The next prime is 231197663. The reversal of 231197651 is 156791132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231197651 - 2¹⁰ = 231196627 is a prime.

It is not a weakly prime, because it can be changed into another prime (231197621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115598825 + 115598826.

It is an arithmetic number, because the mean of its divisors is an integer number (115598826).

Almost surely, 2^231197651 is an apocalyptic number.

231197651 is a deficient number, since it is larger than the sum of its proper divisors (1).

231197651 is an equidigital number, since it uses as much as digits as its factorization.

231197651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 35.

The square root of 231197651 is about 15205.1850038071. The cubic root of 231197651 is about 613.7541934305.

The spelling of 231197651 in words is "two hundred thirty-one million, one hundred ninety-seven thousand, six hundred fifty-one".