157231799 has 2 divisors, whose sum is σ = 157231800. Its totient is φ = 157231798.

The previous prime is 157231771. The next prime is 157231813. The reversal of 157231799 is 997132751.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 157231799 - 2¹² = 157227703 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157231729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78615899 + 78615900.

It is an arithmetic number, because the mean of its divisors is an integer number (78615900).

Almost surely, 2^157231799 is an apocalyptic number.

157231799 is a deficient number, since it is larger than the sum of its proper divisors (1).

157231799 is an equidigital number, since it uses as much as digits as its factorization.

157231799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 119070, while the sum is 44.

The square root of 157231799 is about 12539.2104615881. The cubic root of 157231799 is about 539.7344361793.

The spelling of 157231799 in words is "one hundred fifty-seven million, two hundred thirty-one thousand, seven hundred ninety-nine".