1015172155 has 8 divisors (see below), whose sum is σ = 1220959152. Its totient is φ = 810302688.

The previous prime is 1015172111. The next prime is 1015172161. The reversal of 1015172155 is 5512715101.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1015172155 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226944 + ... + 231373.

It is an arithmetic number, because the mean of its divisors is an integer number (152619894).

Almost surely, 2^1015172155 is an apocalyptic number.

1015172155 is a deficient number, since it is larger than the sum of its proper divisors (205786997).

1015172155 is an equidigital number, since it uses as much as digits as its factorization.

1015172155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458765.

The product of its (nonzero) digits is 1750, while the sum is 28.

The square root of 1015172155 is about 31861.7663509103. The cubic root of 1015172155 is about 1005.0320212894.

Adding to 1015172155 its reverse (5512715101), we get a palindrome (6527887256).

The spelling of 1015172155 in words is "one billion, fifteen million, one hundred seventy-two thousand, one hundred fifty-five".