157941481 has 2 divisors, whose sum is σ = 157941482. Its totient is φ = 157941480.

The previous prime is 157941473. The next prime is 157941491. The reversal of 157941481 is 184149751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140635881 + 17305600 = 11859^2 + 4160^2 .

It is an emirp because it is prime and its reverse (184149751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157941481 - 2³ = 157941473 is a prime.

It is a super-2 number, since 2×157941481² = 49891022840946722, which contains 22 as substring.

It is equal to p_8865517 and since 157941481 and 8865517 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (157941491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78970740 + 78970741.

It is an arithmetic number, because the mean of its divisors is an integer number (78970741).

Almost surely, 2^157941481 is an apocalyptic number.

It is an amenable number.

157941481 is a deficient number, since it is larger than the sum of its proper divisors (1).

157941481 is an equidigital number, since it uses as much as digits as its factorization.

157941481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 40.

The square root of 157941481 is about 12567.4771135658. The cubic root of 157941481 is about 540.5452665599.

The spelling of 157941481 in words is "one hundred fifty-seven million, nine hundred forty-one thousand, four hundred eighty-one".