51097439 has 8 divisors (see below), whose sum is σ = 52508400. Its totient is φ = 49694400.

The previous prime is 51097381. The next prime is 51097471. The reversal of 51097439 is 93479015.

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 51097439 - 2⁸ = 51097183 is a prime.

It is a super-2 number, since 2×51097439² = 5221896544717442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51097489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12524 + ... + 16094.

It is an arithmetic number, because the mean of its divisors is an integer number (6563550).

Almost surely, 2^51097439 is an apocalyptic number.

51097439 is a deficient number, since it is larger than the sum of its proper divisors (1410961).

51097439 is a wasteful number, since it uses less digits than its factorization.

51097439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3961.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 51097439 is about 7148.2472676874. The cubic root of 51097439 is about 371.0790003299.

The spelling of 51097439 in words is "fifty-one million, ninety-seven thousand, four hundred thirty-nine".