51390611 has 4 divisors (see below), whose sum is σ = 54095400. Its totient is φ = 48685824.

The previous prime is 51390587. The next prime is 51390617. The reversal of 51390611 is 11609315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11609315 = 5 ⋅2321863.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51390611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51390617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1352366 + ... + 1352403.

It is an arithmetic number, because the mean of its divisors is an integer number (13523850).

Almost surely, 2^51390611 is an apocalyptic number.

51390611 is a deficient number, since it is larger than the sum of its proper divisors (2704789).

51390611 is a wasteful number, since it uses less digits than its factorization.

51390611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2704788.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 51390611 is about 7168.7245030061. The cubic root of 51390611 is about 371.7873370185.

Adding to 51390611 its reverse (11609315), we get a palindrome (62999926).

The spelling of 51390611 in words is "fifty-one million, three hundred ninety thousand, six hundred eleven".