2272345781 has 16 divisors (see below), whose sum is σ = 2324013120. Its totient is φ = 2221464960.

The previous prime is 2272345771. The next prime is 2272345799. The reversal of 2272345781 is 1875432722.

It is a cyclic number.

It is not a de Polignac number, because 2272345781 - 2¹⁰ = 2272344757 is a prime.

It is a super-2 number, since 2×2272345781² = 10327110696856999922, 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 (2272345741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3326666 + ... + 3327348.

It is an arithmetic number, because the mean of its divisors is an integer number (145250820).

Almost surely, 2^2272345781 is an apocalyptic number.

It is an amenable number.

2272345781 is a deficient number, since it is larger than the sum of its proper divisors (51667339).

2272345781 is a wasteful number, since it uses less digits than its factorization.

2272345781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156.

The product of its digits is 188160, while the sum is 41.

The square root of 2272345781 is about 47669.1281753715. The cubic root of 2272345781 is about 1314.6943789942.

The spelling of 2272345781 in words is "two billion, two hundred seventy-two million, three hundred forty-five thousand, seven hundred eighty-one".