155115797 has 2 divisors, whose sum is σ = 155115798. Its totient is φ = 155115796.

The previous prime is 155115773. The next prime is 155115811. The reversal of 155115797 is 797511551.

155115797 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., 144624676 + 10491121 = 12026^2 + 3239^2 .

It is a cyclic number.

It is not a de Polignac number, because 155115797 - 2²² = 150921493 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155115757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77557898 + 77557899.

It is an arithmetic number, because the mean of its divisors is an integer number (77557899).

Almost surely, 2^155115797 is an apocalyptic number.

It is an amenable number.

155115797 is a deficient number, since it is larger than the sum of its proper divisors (1).

155115797 is an equidigital number, since it uses as much as digits as its factorization.

155115797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55125, while the sum is 41.

The square root of 155115797 is about 12454.5492491700. The cubic root of 155115797 is about 537.3022710242.

The spelling of 155115797 in words is "one hundred fifty-five million, one hundred fifteen thousand, seven hundred ninety-seven".