1521116155 has 32 divisors (see below), whose sum is σ = 2159216640. Its totient is φ = 1017878400.

The previous prime is 1521116143. The next prime is 1521116161. The reversal of 1521116155 is 5516111251.

It is not a de Polignac number, because 1521116155 - 2⁷ = 1521116027 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1630 + ... + 55180.

It is an arithmetic number, because the mean of its divisors is an integer number (67475520).

Almost surely, 2^1521116155 is an apocalyptic number.

1521116155 is a deficient number, since it is larger than the sum of its proper divisors (638100485).

1521116155 is a wasteful number, since it uses less digits than its factorization.

1521116155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53611.

The product of its digits is 1500, while the sum is 28.

The square root of 1521116155 is about 39001.4891382368. The cubic root of 1521116155 is about 1150.0607793963.

The spelling of 1521116155 in words is "one billion, five hundred twenty-one million, one hundred sixteen thousand, one hundred fifty-five".