279222431 has 2 divisors, whose sum is σ = 279222432. Its totient is φ = 279222430.

The previous prime is 279222413. The next prime is 279222473. The reversal of 279222431 is 134222972.

Together with previous prime (279222413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 279222431 - 2¹⁴ = 279206047 is a prime.

It is a super-2 number, since 2×279222431² = 155930331947099522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (279222401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139611215 + 139611216.

It is an arithmetic number, because the mean of its divisors is an integer number (139611216).

Almost surely, 2^279222431 is an apocalyptic number.

279222431 is a deficient number, since it is larger than the sum of its proper divisors (1).

279222431 is an equidigital number, since it uses as much as digits as its factorization.

279222431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 32.

The square root of 279222431 is about 16709.9500597698. The cubic root of 279222431 is about 653.6071101709.

The spelling of 279222431 in words is "two hundred seventy-nine million, two hundred twenty-two thousand, four hundred thirty-one".