155232901 has 2 divisors, whose sum is σ = 155232902. Its totient is φ = 155232900.

The previous prime is 155232827. The next prime is 155232937. The reversal of 155232901 is 109232551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 153115876 + 2117025 = 12374^2 + 1455^2 .

It is an emirp because it is prime and its reverse (109232551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155232901 - 2¹¹ = 155230853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155232901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155232971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77616450 + 77616451.

It is an arithmetic number, because the mean of its divisors is an integer number (77616451).

Almost surely, 2^155232901 is an apocalyptic number.

It is an amenable number.

155232901 is a deficient number, since it is larger than the sum of its proper divisors (1).

155232901 is an equidigital number, since it uses as much as digits as its factorization.

155232901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 155232901 is about 12459.2496162490. The cubic root of 155232901 is about 537.4374483545.

It can be divided in two parts, 1552 and 32901, that added together give a triangular number (34453 = T₂₆₂).

The spelling of 155232901 in words is "one hundred fifty-five million, two hundred thirty-two thousand, nine hundred one".