2278215751 has 6 divisors (see below), whose sum is σ = 2650169400. Its totient is φ = 1952756316.

The previous prime is 2278215701. The next prime is 2278215791. The reversal of 2278215751 is 1575128722.

It is a happy number.

It is not a de Polignac number, because 2278215751 - 2¹¹ = 2278213703 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 (2278215701) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23247051 + ... + 23247148.

It is an arithmetic number, because the mean of its divisors is an integer number (441694900).

Almost surely, 2^2278215751 is an apocalyptic number.

2278215751 is a deficient number, since it is larger than the sum of its proper divisors (371953649).

2278215751 is an equidigital number, since it uses as much as digits as its factorization.

2278215751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46494213 (or 46494206 counting only the distinct ones).

The product of its digits is 78400, while the sum is 40.

The square root of 2278215751 is about 47730.6583968837. The cubic root of 2278215751 is about 1315.8254540648.

The spelling of 2278215751 in words is "two billion, two hundred seventy-eight million, two hundred fifteen thousand, seven hundred fifty-one".