155012313 has 4 divisors (see below), whose sum is σ = 206683088. Its totient is φ = 103341540.

The previous prime is 155012281. The next prime is 155012321. The reversal of 155012313 is 313210551.

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 155012313 - 2⁵ = 155012281 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155012313.

It is not an unprimeable number, because it can be changed into a prime (155012323) 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, 25835383 + ... + 25835388.

It is an arithmetic number, because the mean of its divisors is an integer number (51670772).

Almost surely, 2^155012313 is an apocalyptic number.

It is an amenable number.

155012313 is a deficient number, since it is larger than the sum of its proper divisors (51670775).

155012313 is an equidigital number, since it uses as much as digits as its factorization.

155012313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51670774.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 155012313 is about 12450.3940901483. The cubic root of 155012313 is about 537.1827591096.

Adding to 155012313 its reverse (313210551), we get a palindrome (468222864).

The spelling of 155012313 in words is "one hundred fifty-five million, twelve thousand, three hundred thirteen".