16572481 has 4 divisors (see below), whose sum is σ = 16727472. Its totient is φ = 16417492.

The previous prime is 16572473. The next prime is 16572509. The reversal of 16572481 is 18427561.

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: 18427561 = 157 ⋅117373.

It is a cyclic number.

It is not a de Polignac number, because 16572481 - 2³ = 16572473 is a prime.

It is a super-2 number, since 2×16572481² = 549294252990722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16570481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77335 + ... + 77548.

It is an arithmetic number, because the mean of its divisors is an integer number (4181868).

Almost surely, 2^16572481 is an apocalyptic number.

It is an amenable number.

16572481 is a deficient number, since it is larger than the sum of its proper divisors (154991).

16572481 is a wasteful number, since it uses less digits than its factorization.

16572481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154990.

The product of its digits is 13440, while the sum is 34.

The square root of 16572481 is about 4070.9312202492. The cubic root of 16572481 is about 254.9543991251.

The spelling of 16572481 in words is "sixteen million, five hundred seventy-two thousand, four hundred eighty-one".