1566172242 has 24 divisors (see below), whose sum is σ = 3571972560. Its totient is φ = 494580600.

The previous prime is 1566172217. The next prime is 1566172247. The reversal of 1566172242 is 2422716651.

It is a happy number.

1566172242 is a `hidden beast` number, since 1 + 566 + 1 + 72 + 24 + 2 = 666.

It is a super-2 number, since 2×1566172242² = 4905790983222613128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1566172197 and 1566172206.

It is not an unprimeable number, because it can be changed into a prime (1566172247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2289384 + ... + 2290067.

It is an arithmetic number, because the mean of its divisors is an integer number (148832190).

Almost surely, 2^1566172242 is an apocalyptic number.

1566172242 is an abundant number, since it is smaller than the sum of its proper divisors (2005800318).

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

1566172242 is a wasteful number, since it uses less digits than its factorization.

1566172242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4579478 (or 4579475 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 1566172242 is about 39574.8940870345. The cubic root of 1566172242 is about 1161.3055658213.

Adding to 1566172242 its reverse (2422716651), we get a palindrome (3988888893).

The spelling of 1566172242 in words is "one billion, five hundred sixty-six million, one hundred seventy-two thousand, two hundred forty-two".