155290513 has 4 divisors (see below), whose sum is σ = 177474880. Its totient is φ = 133106148.

The previous prime is 155290511. The next prime is 155290559. The reversal of 155290513 is 315092551.

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 not a de Polignac number, because 155290513 - 2¹ = 155290511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155290511) 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, 11092173 + ... + 11092186.

It is an arithmetic number, because the mean of its divisors is an integer number (44368720).

Almost surely, 2^155290513 is an apocalyptic number.

It is an amenable number.

155290513 is a deficient number, since it is larger than the sum of its proper divisors (22184367).

155290513 is an equidigital number, since it uses as much as digits as its factorization.

155290513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22184366.

The product of its (nonzero) digits is 6750, while the sum is 31.

The square root of 155290513 is about 12461.5614190197. The cubic root of 155290513 is about 537.5039269949.

The spelling of 155290513 in words is "one hundred fifty-five million, two hundred ninety thousand, five hundred thirteen".