51212377 has 2 divisors, whose sum is σ = 51212378. Its totient is φ = 51212376.

The previous prime is 51212351. The next prime is 51212383. The reversal of 51212377 is 77321215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44368921 + 6843456 = 6661^2 + 2616^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51212377 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51212327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25606188 + 25606189.

It is an arithmetic number, because the mean of its divisors is an integer number (25606189).

Almost surely, 2^51212377 is an apocalyptic number.

It is an amenable number.

51212377 is a deficient number, since it is larger than the sum of its proper divisors (1).

51212377 is an equidigital number, since it uses as much as digits as its factorization.

51212377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2940, while the sum is 28.

The square root of 51212377 is about 7156.2823449051. The cubic root of 51212377 is about 371.3570256038.

The spelling of 51212377 in words is "fifty-one million, two hundred twelve thousand, three hundred seventy-seven".