51394499 has 8 divisors (see below), whose sum is σ = 55403712. Its totient is φ = 47393280.

The previous prime is 51394493. The next prime is 51394501. The reversal of 51394499 is 99449315.

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 51394499 - 2⁸ = 51394243 is a prime.

It is a super-2 number, since 2×51394499² = 5282789054922002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51394493) 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, 23267 + ... + 25379.

It is an arithmetic number, because the mean of its divisors is an integer number (6925464).

Almost surely, 2^51394499 is an apocalyptic number.

51394499 is a deficient number, since it is larger than the sum of its proper divisors (4009213).

51394499 is a wasteful number, since it uses less digits than its factorization.

51394499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3997.

The product of its digits is 174960, while the sum is 44.

The square root of 51394499 is about 7168.9956758252. The cubic root of 51394499 is about 371.7967127435.

The spelling of 51394499 in words is "fifty-one million, three hundred ninety-four thousand, four hundred ninety-nine".