2521844042 has 4 divisors (see below), whose sum is σ = 3782766066. Its totient is φ = 1260922020.

The previous prime is 2521844033. The next prime is 2521844047. The reversal of 2521844042 is 2404481252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2006054521 + 515789521 = 44789^2 + 22711^2 .

It is not an unprimeable number, because it can be changed into a prime (2521844047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630461009 + ... + 630461012.

Almost surely, 2^2521844042 is an apocalyptic number.

2521844042 is a deficient number, since it is larger than the sum of its proper divisors (1260922024).

2521844042 is a wasteful number, since it uses less digits than its factorization.

2521844042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260922023.

The product of its (nonzero) digits is 20480, while the sum is 32.

The square root of 2521844042 is about 50217.9653311442. The cubic root of 2521844042 is about 1361.1502743122.

The spelling of 2521844042 in words is "two billion, five hundred twenty-one million, eight hundred forty-four thousand, forty-two".