2921581442 has 16 divisors (see below), whose sum is σ = 4746765240. Its totient is φ = 1340625792.

The previous prime is 2921581441. The next prime is 2921581451. The reversal of 2921581442 is 2441851292.

It can be written as a sum of positive squares in 4 ways, for example, as 2463236161 + 458345281 = 49631^2 + 21409^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2921581396 and 2921581405.

It is not an unprimeable number, because it can be changed into a prime (2921581441) 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, 320267 + ... + 329262.

Almost surely, 2^2921581442 is an apocalyptic number.

2921581442 is a deficient number, since it is larger than the sum of its proper divisors (1825183798).

2921581442 is a wasteful number, since it uses less digits than its factorization.

2921581442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649717.

The product of its digits is 46080, while the sum is 38.

The square root of 2921581442 is about 54051.6553123029. The cubic root of 2921581442 is about 1429.5718871020.

The spelling of 2921581442 in words is "two billion, nine hundred twenty-one million, five hundred eighty-one thousand, four hundred forty-two".