281968157 has 16 divisors (see below), whose sum is σ = 305935872. Its totient is φ = 259277760.

The previous prime is 281968147. The next prime is 281968163. The reversal of 281968157 is 751869182.

It is a cyclic number.

It is not a de Polignac number, because 281968157 - 2⁸ = 281967901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281968147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46463 + ... + 52179.

It is an arithmetic number, because the mean of its divisors is an integer number (19120992).

Almost surely, 2^281968157 is an apocalyptic number.

It is an amenable number.

281968157 is a deficient number, since it is larger than the sum of its proper divisors (23967715).

281968157 is a wasteful number, since it uses less digits than its factorization.

281968157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5828.

The product of its digits is 241920, while the sum is 47.

The square root of 281968157 is about 16791.9074854526. The cubic root of 281968157 is about 655.7425349508.

The spelling of 281968157 in words is "two hundred eighty-one million, nine hundred sixty-eight thousand, one hundred fifty-seven".