155562157 has 2 divisors, whose sum is σ = 155562158. Its totient is φ = 155562156.

The previous prime is 155562149. The next prime is 155562161. The reversal of 155562157 is 751265551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85488516 + 70073641 = 9246^2 + 8371^2 .

It is an emirp because it is prime and its reverse (751265551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155562157 - 2³ = 155562149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155562137) 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, 77781078 + 77781079.

It is an arithmetic number, because the mean of its divisors is an integer number (77781079).

Almost surely, 2^155562157 is an apocalyptic number.

It is an amenable number.

155562157 is a deficient number, since it is larger than the sum of its proper divisors (1).

155562157 is an equidigital number, since it uses as much as digits as its factorization.

155562157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52500, while the sum is 37.

The square root of 155562157 is about 12472.4559329749. The cubic root of 155562157 is about 537.8171563955.

The spelling of 155562157 in words is "one hundred fifty-five million, five hundred sixty-two thousand, one hundred fifty-seven".