281152631 has 2 divisors, whose sum is σ = 281152632. Its totient is φ = 281152630.

The previous prime is 281152601. The next prime is 281152639. The reversal of 281152631 is 136251182.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-281152631 is a prime.

It is a super-2 number, since 2×281152631² = 158093603836444322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 281152594 and 281152603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281152639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140576315 + 140576316.

It is an arithmetic number, because the mean of its divisors is an integer number (140576316).

Almost surely, 2^281152631 is an apocalyptic number.

281152631 is a deficient number, since it is larger than the sum of its proper divisors (1).

281152631 is an equidigital number, since it uses as much as digits as its factorization.

281152631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 29.

The square root of 281152631 is about 16767.6065972458. The cubic root of 281152631 is about 655.1097312419.

The spelling of 281152631 in words is "two hundred eighty-one million, one hundred fifty-two thousand, six hundred thirty-one".