16054981 has 4 divisors (see below), whose sum is σ = 16900000. Its totient is φ = 15209964.

The previous prime is 16054901. The next prime is 16054991. The reversal of 16054981 is 18945061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18945061 = 31 ⋅611131.

It is a cyclic number.

It is not a de Polignac number, because 16054981 - 2⁹ = 16054469 is a prime.

It is a super-2 number, since 2×16054981² = 515524829820722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16054901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 422481 + ... + 422518.

It is an arithmetic number, because the mean of its divisors is an integer number (4225000).

Almost surely, 2^16054981 is an apocalyptic number.

It is an amenable number.

16054981 is a deficient number, since it is larger than the sum of its proper divisors (845019).

16054981 is an equidigital number, since it uses as much as digits as its factorization.

16054981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845018.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 16054981 is about 4006.8667310007. The cubic root of 16054981 is about 252.2725121621.

The spelling of 16054981 in words is "sixteen million, fifty-four thousand, nine hundred eighty-one".