155148901 has 2 divisors, whose sum is σ = 155148902. Its totient is φ = 155148900.

The previous prime is 155148863. The next prime is 155148907. The reversal of 155148901 is 109841551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92659876 + 62489025 = 9626^2 + 7905^2 .

It is an emirp because it is prime and its reverse (109841551) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155148901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155148907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77574450 + 77574451.

It is an arithmetic number, because the mean of its divisors is an integer number (77574451).

Almost surely, 2^155148901 is an apocalyptic number.

It is an amenable number.

155148901 is a deficient number, since it is larger than the sum of its proper divisors (1).

155148901 is an equidigital number, since it uses as much as digits as its factorization.

155148901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 34.

The square root of 155148901 is about 12455.8781705667. The cubic root of 155148901 is about 537.3404910498.

The spelling of 155148901 in words is "one hundred fifty-five million, one hundred forty-eight thousand, nine hundred one".