51377873 has 2 divisors, whose sum is σ = 51377874. Its totient is φ = 51377872.

The previous prime is 51377863. The next prime is 51377891. The reversal of 51377873 is 37877315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34304449 + 17073424 = 5857^2 + 4132^2 .

It is a cyclic number.

It is not a de Polignac number, because 51377873 - 2⁴ = 51377857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51377873.

It is not a weakly prime, because it can be changed into another prime (51377803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25688936 + 25688937.

It is an arithmetic number, because the mean of its divisors is an integer number (25688937).

Almost surely, 2^51377873 is an apocalyptic number.

It is an amenable number.

51377873 is a deficient number, since it is larger than the sum of its proper divisors (1).

51377873 is an equidigital number, since it uses as much as digits as its factorization.

51377873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 123480, while the sum is 41.

The square root of 51377873 is about 7167.8360053785. The cubic root of 51377873 is about 371.7566166311.

The spelling of 51377873 in words is "fifty-one million, three hundred seventy-seven thousand, eight hundred seventy-three".