2278511397 has 16 divisors (see below), whose sum is σ = 3376646080. Its totient is φ = 1518524496.

The previous prime is 2278511381. The next prime is 2278511413. The reversal of 2278511397 is 7931158722.

It is an interprime number because it is at equal distance from previous prime (2278511381) and next prime (2278511413).

It is not a de Polignac number, because 2278511397 - 2⁴ = 2278511381 is a prime.

It is a super-2 number, since 2×2278511397² = 10383228372517783218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2278511297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86598 + ... + 109800.

It is an arithmetic number, because the mean of its divisors is an integer number (211040380).

Almost surely, 2^2278511397 is an apocalyptic number.

2278511397 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2278511397 is a deficient number, since it is larger than the sum of its proper divisors (1098134683).

2278511397 is a wasteful number, since it uses less digits than its factorization.

2278511397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26849 (or 26843 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 2278511397 is about 47733.7553205276. The cubic root of 2278511397 is about 1315.8823701998.

The spelling of 2278511397 in words is "two billion, two hundred seventy-eight million, five hundred eleven thousand, three hundred ninety-seven".