16155901 has 2 divisors, whose sum is σ = 16155902. Its totient is φ = 16155900.

The previous prime is 16155877. The next prime is 16155941. The reversal of 16155901 is 10955161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11088900 + 5067001 = 3330^2 + 2251^2 .

It is a cyclic number.

It is not a de Polignac number, because 16155901 - 2⁵ = 16155869 is a prime.

It is a super-2 number, since 2×16155901² = 522026274243602, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16155901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16155941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8077950 + 8077951.

It is an arithmetic number, because the mean of its divisors is an integer number (8077951).

Almost surely, 2^16155901 is an apocalyptic number.

It is an amenable number.

16155901 is a deficient number, since it is larger than the sum of its proper divisors (1).

16155901 is an equidigital number, since it uses as much as digits as its factorization.

16155901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350, while the sum is 28.

The square root of 16155901 is about 4019.4403839341. The cubic root of 16155901 is about 252.7999950345.

The spelling of 16155901 in words is "sixteen million, one hundred fifty-five thousand, nine hundred one".