2228155731 has 12 divisors (see below), whose sum is σ = 3219895120. Its totient is φ = 1484768880.

The previous prime is 2228155703. The next prime is 2228155733. The reversal of 2228155731 is 1375518222.

2228155731 is a `hidden beast` number, since 2 + 2 + 2 + 81 + 5 + 573 + 1 = 666.

It is not a de Polignac number, because 2228155731 - 2⁷ = 2228155603 is a prime.

It is a super-2 number, since 2×2228155731² = 9929355923176288722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2228155733) 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 11 ways as a sum of consecutive naturals, for example, 34135 + ... + 74976.

Almost surely, 2^2228155731 is an apocalyptic number.

2228155731 is a deficient number, since it is larger than the sum of its proper divisors (991739389).

2228155731 is a wasteful number, since it uses less digits than its factorization.

2228155731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111386 (or 111383 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 2228155731 is about 47203.3444895592. The cubic root of 2228155731 is about 1306.1162932792.

The spelling of 2228155731 in words is "two billion, two hundred twenty-eight million, one hundred fifty-five thousand, seven hundred thirty-one".