51440097 has 8 divisors (see below), whose sum is σ = 68942944. Its totient is φ = 34115328.

The previous prime is 51440071. The next prime is 51440099. The reversal of 51440097 is 79004415.

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 51440097 - 2¹⁵ = 51407329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51440099) 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, 43843 + ... + 45000.

It is an arithmetic number, because the mean of its divisors is an integer number (8617868).

Almost surely, 2^51440097 is an apocalyptic number.

It is an amenable number.

51440097 is a deficient number, since it is larger than the sum of its proper divisors (17502847).

51440097 is a wasteful number, since it uses less digits than its factorization.

51440097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89039.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 51440097 is about 7172.1751930638. The cubic root of 51440097 is about 371.9066348532.

The spelling of 51440097 in words is "fifty-one million, four hundred forty thousand, ninety-seven".