51409505 has 16 divisors (see below), whose sum is σ = 71207424. Its totient is φ = 34900800.

The previous prime is 51409499. The next prime is 51409507. The reversal of 51409505 is 50590415.

It is not a de Polignac number, because 51409505 - 2⁶ = 51409441 is a prime.

It is a super-4 number, since 4×51409505⁴ (a number of 32 digits) contains 4444 as substring.

It is a zygodrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (51409507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3737 + ... + 10806.

It is an arithmetic number, because the mean of its divisors is an integer number (4450464).

Almost surely, 2^51409505 is an apocalyptic number.

It is an amenable number.

51409505 is a deficient number, since it is larger than the sum of its proper divisors (19797919).

51409505 is a wasteful number, since it uses less digits than its factorization.

51409505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14656.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 51409505 is about 7170.0421895551. The cubic root of 51409505 is about 371.8328945572.

The spelling of 51409505 in words is "fifty-one million, four hundred nine thousand, five hundred five".