155530513 has 4 divisors (see below), whose sum is σ = 155688448. Its totient is φ = 155372580.

The previous prime is 155530511. The next prime is 155530537. The reversal of 155530513 is 315035551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 155530513 - 2¹ = 155530511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155530511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77481 + ... + 79462.

It is an arithmetic number, because the mean of its divisors is an integer number (38922112).

Almost surely, 2^155530513 is an apocalyptic number.

It is an amenable number.

155530513 is a deficient number, since it is larger than the sum of its proper divisors (157935).

155530513 is an equidigital number, since it uses as much as digits as its factorization.

155530513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157934.

The product of its (nonzero) digits is 5625, while the sum is 28.

The square root of 155530513 is about 12471.1873131631. The cubic root of 155530513 is about 537.7806868571.

The spelling of 155530513 in words is "one hundred fifty-five million, five hundred thirty thousand, five hundred thirteen".