1556022442 has 64 divisors (see below), whose sum is σ = 2726680320. Its totient is φ = 659902464.

The previous prime is 1556022431. The next prime is 1556022443. The reversal of 1556022442 is 2442206551.

It is not an unprimeable number, because it can be changed into a prime (1556022443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2696458 + ... + 2697034.

It is an arithmetic number, because the mean of its divisors is an integer number (42604380).

Almost surely, 2^1556022442 is an apocalyptic number.

1556022442 is a deficient number, since it is larger than the sum of its proper divisors (1170657878).

1556022442 is a wasteful number, since it uses less digits than its factorization.

1556022442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767.

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 1556022442 is about 39446.4503092484. The cubic root of 1556022442 is about 1158.7914588227.

Adding to 1556022442 its reverse (2442206551), we get a palindrome (3998228993).

The spelling of 1556022442 in words is "one billion, five hundred fifty-six million, twenty-two thousand, four hundred forty-two".