51212783 has 2 divisors, whose sum is σ = 51212784. Its totient is φ = 51212782.

The previous prime is 51212779. The next prime is 51212803. The reversal of 51212783 is 38721215.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51212783 - 2² = 51212779 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51212383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25606391 + 25606392.

It is an arithmetic number, because the mean of its divisors is an integer number (25606392).

Almost surely, 2^51212783 is an apocalyptic number.

51212783 is a deficient number, since it is larger than the sum of its proper divisors (1).

51212783 is an equidigital number, since it uses as much as digits as its factorization.

51212783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 29.

The square root of 51212783 is about 7156.3107115329. The cubic root of 51212783 is about 371.3580069457.

Adding to 51212783 its reverse (38721215), we get a palindrome (89933998).

The spelling of 51212783 in words is "fifty-one million, two hundred twelve thousand, seven hundred eighty-three".