281986225651 has 32 divisors (see below), whose sum is σ = 309352369536. Its totient is φ = 255467520000.

The previous prime is 281986225597. The next prime is 281986225721. The reversal of 281986225651 is 156522689182.

It is a cyclic number.

It is not a de Polignac number, because 281986225651 - 2⁷ = 281986225523 is a prime.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 281986225592 and 281986225601.

It is not an unprimeable number, because it can be changed into a prime (281986225151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 320074731 + ... + 320075611.

It is an arithmetic number, because the mean of its divisors is an integer number (9667261548).

Almost surely, 2^281986225651 is an apocalyptic number.

281986225651 is a deficient number, since it is larger than the sum of its proper divisors (27366143885).

281986225651 is a wasteful number, since it uses less digits than its factorization.

281986225651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2143.

The product of its digits is 4147200, while the sum is 55.

The spelling of 281986225651 in words is "two hundred eighty-one billion, nine hundred eighty-six million, two hundred twenty-five thousand, six hundred fifty-one".