157671517 has 2 divisors, whose sum is σ = 157671518. Its totient is φ = 157671516.

The previous prime is 157671491. The next prime is 157671523. The reversal of 157671517 is 715176751.

It is a happy number.

157671517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150087001 + 7584516 = 12251^2 + 2754^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157671517 is a prime.

It is equal to p_8851198 and since 157671517 and 8851198 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 157671517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157671587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78835758 + 78835759.

It is an arithmetic number, because the mean of its divisors is an integer number (78835759).

Almost surely, 2^157671517 is an apocalyptic number.

It is an amenable number.

157671517 is a deficient number, since it is larger than the sum of its proper divisors (1).

157671517 is an equidigital number, since it uses as much as digits as its factorization.

157671517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51450, while the sum is 40.

The square root of 157671517 is about 12556.7319394817. The cubic root of 157671517 is about 540.2371123761.

The spelling of 157671517 in words is "one hundred fifty-seven million, six hundred seventy-one thousand, five hundred seventeen".