2156225747 has 8 divisors (see below), whose sum is σ = 2353899744. Its totient is φ = 1963096128.

The previous prime is 2156225723. The next prime is 2156225749. The reversal of 2156225747 is 7475226512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2156225747 - 2¹⁶ = 2156160211 is a prime.

It is a Duffinian 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 in 7 ways as a sum of consecutive naturals, for example, 1135103 + ... + 1137000.

It is an arithmetic number, because the mean of its divisors is an integer number (294237468).

Almost surely, 2^2156225747 is an apocalyptic number.

2156225747 is a deficient number, since it is larger than the sum of its proper divisors (197673997).

2156225747 is a wasteful number, since it uses less digits than its factorization.

2156225747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2272189.

The product of its digits is 235200, while the sum is 41.

The square root of 2156225747 is about 46435.1779042570. The cubic root of 2156225747 is about 1291.9074693627.

The spelling of 2156225747 in words is "two billion, one hundred fifty-six million, two hundred twenty-five thousand, seven hundred forty-seven".