51440326 has 16 divisors (see below), whose sum is σ = 89393184. Its totient is φ = 21743424.

The previous prime is 51440303. The next prime is 51440327. The reversal of 51440326 is 62304415.

It is a super-2 number, since 2×51440326² = 5292214277972552, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51440326.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51440327) 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, 24145 + ... + 26188.

It is an arithmetic number, because the mean of its divisors is an integer number (5587074).

Almost surely, 2^51440326 is an apocalyptic number.

51440326 is a deficient number, since it is larger than the sum of its proper divisors (37952858).

51440326 is a wasteful number, since it uses less digits than its factorization.

51440326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50415.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 51440326 is about 7172.1911575194. The cubic root of 51440326 is about 371.9071867346.

The spelling of 51440326 in words is "fifty-one million, four hundred forty thousand, three hundred twenty-six".