155087297 has 4 divisors (see below), whose sum is σ = 158869956. Its totient is φ = 151304640.

The previous prime is 155087293. The next prime is 155087299. The reversal of 155087297 is 792780551.

155087297 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 89946256 + 65141041 = 9484^2 + 8071^2 .

It is a cyclic number.

It is not a de Polignac number, because 155087297 - 2² = 155087293 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155087293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1891268 + ... + 1891349.

It is an arithmetic number, because the mean of its divisors is an integer number (39717489).

Almost surely, 2^155087297 is an apocalyptic number.

It is an amenable number.

155087297 is a deficient number, since it is larger than the sum of its proper divisors (3782659).

155087297 is an equidigital number, since it uses as much as digits as its factorization.

155087297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3782658.

The product of its (nonzero) digits is 176400, while the sum is 44.

The square root of 155087297 is about 12453.4050363746. The cubic root of 155087297 is about 537.2693621630.

The spelling of 155087297 in words is "one hundred fifty-five million, eighty-seven thousand, two hundred ninety-seven".