157528381 has 2 divisors, whose sum is σ = 157528382. Its totient is φ = 157528380.

The previous prime is 157528363. The next prime is 157528421. The reversal of 157528381 is 183825751.

It is an a-pointer prime, because the next prime (157528421) can be obtained adding 157528381 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118265625 + 39262756 = 10875^2 + 6266^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157528381 is a prime.

It is a super-2 number, since 2×157528381² = 49630381640962322, 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 (157528361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78764190 + 78764191.

It is an arithmetic number, because the mean of its divisors is an integer number (78764191).

Almost surely, 2^157528381 is an apocalyptic number.

It is an amenable number.

157528381 is a deficient number, since it is larger than the sum of its proper divisors (1).

157528381 is an equidigital number, since it uses as much as digits as its factorization.

157528381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67200, while the sum is 40.

The square root of 157528381 is about 12551.0310731828. The cubic root of 157528381 is about 540.0735850797.

The spelling of 157528381 in words is "one hundred fifty-seven million, five hundred twenty-eight thousand, three hundred eighty-one".