1561262022 has 24 divisors (see below), whose sum is σ = 3446561664. Its totient is φ = 510601104.

The previous prime is 1561261993. The next prime is 1561262033. The reversal of 1561262022 is 2202621651.

1561262022 is a `hidden beast` number, since 1 + 5 + 6 + 12 + 620 + 22 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 817318 + ... + 819225.

It is an arithmetic number, because the mean of its divisors is an integer number (143606736).

Almost surely, 2^1561262022 is an apocalyptic number.

1561262022 is an abundant number, since it is smaller than the sum of its proper divisors (1885299642).

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

1561262022 is a wasteful number, since it uses less digits than its factorization.

1561262022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636604 (or 1636601 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1561262022 is about 39512.8083284395. The cubic root of 1561262022 is about 1160.0906642374.

Adding to 1561262022 its reverse (2202621651), we get a palindrome (3763883673).

The spelling of 1561262022 in words is "one billion, five hundred sixty-one million, two hundred sixty-two thousand, twenty-two".