155215013 has 8 divisors (see below), whose sum is σ = 157418880. Its totient is φ = 153017280.

The previous prime is 155215003. The next prime is 155215031. The reversal of 155215013 is 310512551.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155215013 - 2¹⁸ = 154952869 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 155215013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155215003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76178 + ... + 78188.

It is an arithmetic number, because the mean of its divisors is an integer number (19677360).

Almost surely, 2^155215013 is an apocalyptic number.

It is an amenable number.

155215013 is a deficient number, since it is larger than the sum of its proper divisors (2203867).

155215013 is an equidigital number, since it uses as much as digits as its factorization.

155215013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3067.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 155215013 is about 12458.5317353210. The cubic root of 155215013 is about 537.4168039973.

Adding to 155215013 its reverse (310512551), we get a palindrome (465727564).

The spelling of 155215013 in words is "one hundred fifty-five million, two hundred fifteen thousand, thirteen".