155297513 has 6 divisors (see below), whose sum is σ = 180652266. Its totient is φ = 133112112.

The previous prime is 155297503. The next prime is 155297537. The reversal of 155297513 is 315792551.

It can be written as a sum of positive squares in only one way, i.e., 128754409 + 26543104 = 11347^2 + 5152^2 .

It is not a de Polignac number, because 155297513 - 2¹² = 155293417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (155297503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1584620 + ... + 1584717.

It is an arithmetic number, because the mean of its divisors is an integer number (30108711).

Almost surely, 2^155297513 is an apocalyptic number.

It is an amenable number.

155297513 is a deficient number, since it is larger than the sum of its proper divisors (25354753).

155297513 is an equidigital number, since it uses as much as digits as its factorization.

155297513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3169351 (or 3169344 counting only the distinct ones).

The product of its digits is 47250, while the sum is 38.

The square root of 155297513 is about 12461.8422795348. The cubic root of 155297513 is about 537.5120031933.

The spelling of 155297513 in words is "one hundred fifty-five million, two hundred ninety-seven thousand, five hundred thirteen".