157403381 has 2 divisors, whose sum is σ = 157403382. Its totient is φ = 157403380.

The previous prime is 157403359. The next prime is 157403413. The reversal of 157403381 is 183304751.

157403381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (157403413) can be obtained adding 157403381 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155401156 + 2002225 = 12466^2 + 1415^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157403381 is a prime.

It is a super-2 number, since 2×157403381² = 49551648700462322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157403321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78701690 + 78701691.

It is an arithmetic number, because the mean of its divisors is an integer number (78701691).

Almost surely, 2^157403381 is an apocalyptic number.

It is an amenable number.

157403381 is a deficient number, since it is larger than the sum of its proper divisors (1).

157403381 is an equidigital number, since it uses as much as digits as its factorization.

157403381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 157403381 is about 12546.0504143734. The cubic root of 157403381 is about 539.9306964100.

The spelling of 157403381 in words is "one hundred fifty-seven million, four hundred three thousand, three hundred eighty-one".