2278831 has 2 divisors, whose sum is σ = 2278832. Its totient is φ = 2278830.

The previous prime is 2278823. The next prime is 2278847. The reversal of 2278831 is 1388722.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2278831 - 2³ = 2278823 is a prime.

It is a super-2 number, since 2×2278831² = 10386141453122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2278793 and 2278802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2278811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1139415 + 1139416.

It is an arithmetic number, because the mean of its divisors is an integer number (1139416).

2^2278831 is an apocalyptic number.

2278831 is a deficient number, since it is larger than the sum of its proper divisors (1).

2278831 is an equidigital number, since it uses as much as digits as its factorization.

2278831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 31.

The square root of 2278831 is about 1509.5797428424. The cubic root of 2278831 is about 131.5943892866.

The spelling of 2278831 in words is "two million, two hundred seventy-eight thousand, eight hundred thirty-one".