2209451971 has 16 divisors (see below), whose sum is σ = 2423312640. Its totient is φ = 2005104640.

The previous prime is 2209451891. The next prime is 2209451983. The reversal of 2209451971 is 1791549022.

It is a happy number.

2209451971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2209451971 - 2⁹ = 2209451459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2209451071) 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, 431790 + ... + 436876.

It is an arithmetic number, because the mean of its divisors is an integer number (151457040).

Almost surely, 2^2209451971 is an apocalyptic number.

2209451971 is a deficient number, since it is larger than the sum of its proper divisors (213860669).

2209451971 is a wasteful number, since it uses less digits than its factorization.

2209451971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6014.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 2209451971 is about 47004.8079562081. The cubic root of 2209451971 is about 1302.4513846255.

The spelling of 2209451971 in words is "two billion, two hundred nine million, four hundred fifty-one thousand, nine hundred seventy-one".