231533454051157 has 2 divisors, whose sum is σ = 231533454051158. Its totient is φ = 231533454051156.

The previous prime is 231533454051127. The next prime is 231533454051161. The reversal of 231533454051157 is 751150454335132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195846618019441 + 35686836031716 = 13994521^2 + 5973846^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231533454051157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231533454051157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231533454051127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115766727025578 + 115766727025579.

It is an arithmetic number, because the mean of its divisors is an integer number (115766727025579).

Almost surely, 2^{231533454051157} is an apocalyptic number.

It is an amenable number.

231533454051157 is a deficient number, since it is larger than the sum of its proper divisors (1).

231533454051157 is an equidigital number, since it uses as much as digits as its factorization.

231533454051157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780000, while the sum is 49.

The spelling of 231533454051157 in words is "two hundred thirty-one trillion, five hundred thirty-three billion, four hundred fifty-four million, fifty-one thousand, one hundred fifty-seven".