155120515 has 8 divisors (see below), whose sum is σ = 203066928. Its totient is φ = 112814880.

The previous prime is 155120509. The next prime is 155120519. The reversal of 155120515 is 515021551.

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

It is not a de Polignac number, because 155120515 - 2⁷ = 155120387 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 155120515.

It is not an unprimeable number, because it can be changed into a prime (155120519) 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, 1410132 + ... + 1410241.

It is an arithmetic number, because the mean of its divisors is an integer number (25383366).

Almost surely, 2^155120515 is an apocalyptic number.

155120515 is a deficient number, since it is larger than the sum of its proper divisors (47946413).

155120515 is a wasteful number, since it uses less digits than its factorization.

155120515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2820389.

The product of its (nonzero) digits is 1250, while the sum is 25.

The square root of 155120515 is about 12454.7386564311. The cubic root of 155120515 is about 537.3077184952.

The spelling of 155120515 in words is "one hundred fifty-five million, one hundred twenty thousand, five hundred fifteen".