157156621 has 2 divisors, whose sum is σ = 157156622. Its totient is φ = 157156620.

The previous prime is 157156609. The next prime is 157156633. The reversal of 157156621 is 126651751.

It is a balanced prime because it is at equal distance from previous prime (157156609) and next prime (157156633).

It can be written as a sum of positive squares in only one way, i.e., 148571721 + 8584900 = 12189^2 + 2930^2 .

It is a cyclic number.

It is not a de Polignac number, because 157156621 - 2¹¹ = 157154573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157156691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78578310 + 78578311.

It is an arithmetic number, because the mean of its divisors is an integer number (78578311).

Almost surely, 2^157156621 is an apocalyptic number.

It is an amenable number.

157156621 is a deficient number, since it is larger than the sum of its proper divisors (1).

157156621 is an equidigital number, since it uses as much as digits as its factorization.

157156621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 34.

The square root of 157156621 is about 12536.2123865225. The cubic root of 157156621 is about 539.6484005207.

The spelling of 157156621 in words is "one hundred fifty-seven million, one hundred fifty-six thousand, six hundred twenty-one".