51430505 has 16 divisors (see below), whose sum is σ = 70654464. Its totient is φ = 35206080.

The previous prime is 51430499. The next prime is 51430517. The reversal of 51430505 is 50503415.

It is not a de Polignac number, because 51430505 - 2¹⁸ = 51168361 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31079 + ... + 32691.

It is an arithmetic number, because the mean of its divisors is an integer number (4415904).

Almost surely, 2^51430505 is an apocalyptic number.

It is an amenable number.

51430505 is a deficient number, since it is larger than the sum of its proper divisors (19223959).

51430505 is a wasteful number, since it uses less digits than its factorization.

51430505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2536.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 51430505 is about 7171.5064665661. The cubic root of 51430505 is about 371.8835170236.

The spelling of 51430505 in words is "fifty-one million, four hundred thirty thousand, five hundred five".