51319497 has 8 divisors (see below), whose sum is σ = 68467840. Its totient is φ = 34192080.

The previous prime is 51319487. The next prime is 51319501. The reversal of 51319497 is 79491315.

It is a happy number.

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

It is not a de Polignac number, because 51319497 - 2⁷ = 51319369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51319487) 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, 1872 + ... + 10302.

It is an arithmetic number, because the mean of its divisors is an integer number (8558480).

Almost surely, 2^51319497 is an apocalyptic number.

It is an amenable number.

51319497 is a deficient number, since it is larger than the sum of its proper divisors (17148343).

51319497 is a wasteful number, since it uses less digits than its factorization.

51319497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10463.

The product of its digits is 34020, while the sum is 39.

The square root of 51319497 is about 7163.7627682664. The cubic root of 51319497 is about 371.6157655384.

The spelling of 51319497 in words is "fifty-one million, three hundred nineteen thousand, four hundred ninety-seven".