2042240440442 has 4 divisors (see below), whose sum is σ = 3063360660666. Its totient is φ = 1021120220220.

The previous prime is 2042240440397. The next prime is 2042240440451. The reversal of 2042240440442 is 2440440422402.

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., 1427974810441 + 614265630001 = 1194979^2 + 783751^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2042240440399 and 2042240440408.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510560110109 + ... + 510560110112.

Almost surely, 2^{2042240440442} is an apocalyptic number.

2042240440442 is a deficient number, since it is larger than the sum of its proper divisors (1021120220224).

2042240440442 is a wasteful number, since it uses less digits than its factorization.

2042240440442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021120220223.

The product of its (nonzero) digits is 65536, while the sum is 32.

Adding to 2042240440442 its reverse (2440440422402), we get a palindrome (4482680862844).

The spelling of 2042240440442 in words is "two trillion, forty-two billion, two hundred forty million, four hundred forty thousand, four hundred forty-two".