2156225744 has 10 divisors (see below), whose sum is σ = 4177687410. Its totient is φ = 1078112864.

The previous prime is 2156225723. The next prime is 2156225749. The reversal of 2156225744 is 4475226512.

It can be written as a sum of positive squares in only one way, i.e., 2144801344 + 11424400 = 46312^2 + 3380^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2156225698 and 2156225707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156225749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67382039 + ... + 67382070.

It is an arithmetic number, because the mean of its divisors is an integer number (417768741).

Almost surely, 2^2156225744 is an apocalyptic number.

It is an amenable number.

2156225744 is a deficient number, since it is larger than the sum of its proper divisors (2021461666).

2156225744 is a wasteful number, since it uses less digits than its factorization.

2156225744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134764117 (or 134764111 counting only the distinct ones).

The product of its digits is 134400, while the sum is 38.

The square root of 2156225744 is about 46435.1778719539. The cubic root of 2156225744 is about 1291.9074687636.

The spelling of 2156225744 in words is "two billion, one hundred fifty-six million, two hundred twenty-five thousand, seven hundred forty-four".