1516217889 has 8 divisors (see below), whose sum is σ = 2032918560. Its totient is φ = 1005164576.

The previous prime is 1516217887. The next prime is 1516217897. The reversal of 1516217889 is 9887126151.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1516217889 - 2¹ = 1516217887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1516217887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1411212 + ... + 1412285.

It is an arithmetic number, because the mean of its divisors is an integer number (254114820).

Almost surely, 2^1516217889 is an apocalyptic number.

It is an amenable number.

1516217889 is a deficient number, since it is larger than the sum of its proper divisors (516700671).

1516217889 is a wasteful number, since it uses less digits than its factorization.

1516217889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2823679.

The product of its digits is 241920, while the sum is 48.

The square root of 1516217889 is about 38938.6426188690. The cubic root of 1516217889 is about 1148.8249848376.

The spelling of 1516217889 in words is "one billion, five hundred sixteen million, two hundred seventeen thousand, eight hundred eighty-nine".