157190019281 has 2 divisors, whose sum is σ = 157190019282. Its totient is φ = 157190019280.

The previous prime is 157190019251. The next prime is 157190019319. The reversal of 157190019281 is 182910091751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142192343056 + 14997676225 = 377084^2 + 122465^2 .

It is an emirp because it is prime and its reverse (182910091751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157190019281 - 2²² = 157185824977 is a prime.

It is a super-2 number, since 2×157190019281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (157190019251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78595009640 + 78595009641.

It is an arithmetic number, because the mean of its divisors is an integer number (78595009641).

Almost surely, 2^157190019281 is an apocalyptic number.

It is an amenable number.

157190019281 is a deficient number, since it is larger than the sum of its proper divisors (1).

157190019281 is an equidigital number, since it uses as much as digits as its factorization.

157190019281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 44.

The spelling of 157190019281 in words is "one hundred fifty-seven billion, one hundred ninety million, nineteen thousand, two hundred eighty-one".