2142771456 has 72 divisors (see below), whose sum is σ = 6517612864. Its totient is φ = 612218880.

The previous prime is 2142771451. The next prime is 2142771457. The reversal of 2142771456 is 6541772412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142771451) 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, 193915 + ... + 204666.

Almost surely, 2^2142771456 is an apocalyptic number.

It is an amenable number.

2142771456 is an abundant number, since it is smaller than the sum of its proper divisors (4374841408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2142771456 is an equidigital number, since it uses as much as digits as its factorization.

2142771456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398607 (or 398593 counting only the distinct ones).

The product of its digits is 94080, while the sum is 39.

The square root of 2142771456 is about 46290.0794555378. The cubic root of 2142771456 is about 1289.2148049011.

The spelling of 2142771456 in words is "two billion, one hundred forty-two million, seven hundred seventy-one thousand, four hundred fifty-six".