157157549 has 2 divisors, whose sum is σ = 157157550. Its totient is φ = 157157548.

The previous prime is 157157513. The next prime is 157157563. The reversal of 157157549 is 945751751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155800324 + 1357225 = 12482^2 + 1165^2 .

It is a cyclic number.

It is not a de Polignac number, because 157157549 - 2²⁴ = 140380333 is a prime.

It is equal to p_8823986 and since 157157549 and 8823986 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157157579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78578774 + 78578775.

It is an arithmetic number, because the mean of its divisors is an integer number (78578775).

Almost surely, 2^157157549 is an apocalyptic number.

It is an amenable number.

157157549 is a deficient number, since it is larger than the sum of its proper divisors (1).

157157549 is an equidigital number, since it uses as much as digits as its factorization.

157157549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 220500, while the sum is 44.

The square root of 157157549 is about 12536.2493992422. The cubic root of 157157549 is about 539.6494627153.

The spelling of 157157549 in words is "one hundred fifty-seven million, one hundred fifty-seven thousand, five hundred forty-nine".