155352257 has 2 divisors, whose sum is σ = 155352258. Its totient is φ = 155352256.

The previous prime is 155352209. The next prime is 155352289. The reversal of 155352257 is 752253551.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155351296 + 961 = 12464^2 + 31^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155352257 is a prime.

It is not a weakly prime, because it can be changed into another prime (155351257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77676128 + 77676129.

It is an arithmetic number, because the mean of its divisors is an integer number (77676129).

Almost surely, 2^155352257 is an apocalyptic number.

It is an amenable number.

155352257 is a deficient number, since it is larger than the sum of its proper divisors (1).

155352257 is an equidigital number, since it uses as much as digits as its factorization.

155352257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52500, while the sum is 35.

The square root of 155352257 is about 12464.0385509673. The cubic root of 155352257 is about 537.5751553104.

The spelling of 155352257 in words is "one hundred fifty-five million, three hundred fifty-two thousand, two hundred fifty-seven".