15201994 has 8 divisors (see below), whose sum is σ = 22827168. Its totient is φ = 7592940.

The previous prime is 15201971. The next prime is 15202007. The reversal of 15201994 is 49910251.

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

It is a super-2 number, since 2×15201994² = 462201243152072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1302 + ... + 5665.

It is an arithmetic number, because the mean of its divisors is an integer number (2853396).

Almost surely, 2^15201994 is an apocalyptic number.

15201994 is a deficient number, since it is larger than the sum of its proper divisors (7625174).

15201994 is a wasteful number, since it uses less digits than its factorization.

15201994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8060.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 15201994 is about 3898.9734546416. The cubic root of 15201994 is about 247.7232974405.

The spelling of 15201994 in words is "fifteen million, two hundred one thousand, nine hundred ninety-four".