16121155 has 8 divisors (see below), whose sum is σ = 19526832. Its totient is φ = 12775968.

The previous prime is 16121143. The next prime is 16121179. The reversal of 16121155 is 55112161.

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 16121155 - 2¹¹ = 16119107 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, 14532 + ... + 15601.

It is an arithmetic number, because the mean of its divisors is an integer number (2440854).

Almost surely, 2^16121155 is an apocalyptic number.

16121155 is a deficient number, since it is larger than the sum of its proper divisors (3405677).

16121155 is a wasteful number, since it uses less digits than its factorization.

16121155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30245.

The product of its digits is 300, while the sum is 22.

The square root of 16121155 is about 4015.1158140208. The cubic root of 16121155 is about 252.6186352294.

It can be divided in two parts, 161 and 21155, that added together give a square (21316 = 146²).

The spelling of 16121155 in words is "sixteen million, one hundred twenty-one thousand, one hundred fifty-five".