16425881 has 2 divisors, whose sum is σ = 16425882. Its totient is φ = 16425880.

The previous prime is 16425853. The next prime is 16425907. The reversal of 16425881 is 18852461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9665881 + 6760000 = 3109^2 + 2600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16425881 is a prime.

It is a super-2 number, since 2×16425881² = 539619133252322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16425181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8212940 + 8212941.

It is an arithmetic number, because the mean of its divisors is an integer number (8212941).

Almost surely, 2^16425881 is an apocalyptic number.

It is an amenable number.

16425881 is a deficient number, since it is larger than the sum of its proper divisors (1).

16425881 is an equidigital number, since it uses as much as digits as its factorization.

16425881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15360, while the sum is 35.

The square root of 16425881 is about 4052.8855152841. The cubic root of 16425881 is about 254.2003967538.

The spelling of 16425881 in words is "sixteen million, four hundred twenty-five thousand, eight hundred eighty-one".