16231481 has 8 divisors (see below), whose sum is σ = 19641600. Its totient is φ = 13094208.

The previous prime is 16231469. The next prime is 16231483. The reversal of 16231481 is 18413261.

16231481 = T₂₁₅₀ + T₂₁₅₁ + ... + T₂₁₅₆.

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 16231481 - 2¹⁴ = 16215097 is a prime.

It is a super-2 number, since 2×16231481² = 526921950906722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16231481.

It is not an unprimeable number, because it can be changed into a prime (16231483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68081 + ... + 68318.

It is an arithmetic number, because the mean of its divisors is an integer number (2455200).

Almost surely, 2^16231481 is an apocalyptic number.

It is an amenable number.

16231481 is a deficient number, since it is larger than the sum of its proper divisors (3410119).

16231481 is a wasteful number, since it uses less digits than its factorization.

16231481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136423.

The product of its digits is 1152, while the sum is 26.

The square root of 16231481 is about 4028.8312200935. The cubic root of 16231481 is about 253.1935954113.

The spelling of 16231481 in words is "sixteen million, two hundred thirty-one thousand, four hundred eighty-one".