2145771224 has 8 divisors (see below), whose sum is σ = 4023321060. Its totient is φ = 1072885608.

The previous prime is 2145771211. The next prime is 2145771227. The reversal of 2145771224 is 4221775412.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145771227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134110694 + ... + 134110709.

Almost surely, 2^2145771224 is an apocalyptic number.

It is an amenable number.

2145771224 is a deficient number, since it is larger than the sum of its proper divisors (1877549836).

2145771224 is a wasteful number, since it uses less digits than its factorization.

2145771224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268221409 (or 268221405 counting only the distinct ones).

The product of its digits is 31360, while the sum is 35.

The square root of 2145771224 is about 46322.4699686880. The cubic root of 2145771224 is about 1289.8161354839.

The spelling of 2145771224 in words is "two billion, one hundred forty-five million, seven hundred seventy-one thousand, two hundred twenty-four".