51194493 has 36 divisors (see below), whose sum is σ = 89233248. Its totient is φ = 27702000.

The previous prime is 51194489. The next prime is 51194503. The reversal of 51194493 is 39449115.

It is a happy number.

It is not a de Polignac number, because 51194493 - 2² = 51194489 is a prime.

It is a super-2 number, since 2×51194493² = 5241752227054098, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51194413) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 21618 + ... + 23868.

Almost surely, 2^51194493 is an apocalyptic number.

It is an amenable number.

51194493 is a deficient number, since it is larger than the sum of its proper divisors (38038755).

51194493 is a wasteful number, since it uses less digits than its factorization.

51194493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2302 (or 2280 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 51194493 is about 7155.0327043278. The cubic root of 51194493 is about 371.3137930712.

The spelling of 51194493 in words is "fifty-one million, one hundred ninety-four thousand, four hundred ninety-three".