157835521 has 2 divisors, whose sum is σ = 157835522. Its totient is φ = 157835520.

The previous prime is 157835519. The next prime is 157835533. The reversal of 157835521 is 125538751.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104837121 + 52998400 = 10239^2 + 7280^2 .

It is a cyclic number.

It is not a de Polignac number, because 157835521 - 2¹ = 157835519 is a prime.

Together with 157835519, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (157835501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78917760 + 78917761.

It is an arithmetic number, because the mean of its divisors is an integer number (78917761).

Almost surely, 2^157835521 is an apocalyptic number.

It is an amenable number.

157835521 is a deficient number, since it is larger than the sum of its proper divisors (1).

157835521 is an equidigital number, since it uses as much as digits as its factorization.

157835521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42000, while the sum is 37.

The square root of 157835521 is about 12563.2607630344. The cubic root of 157835521 is about 540.4243589314.

The spelling of 157835521 in words is "one hundred fifty-seven million, eight hundred thirty-five thousand, five hundred twenty-one".