51377173 has 2 divisors, whose sum is σ = 51377174. Its totient is φ = 51377172.

The previous prime is 51377171. The next prime is 51377177. The reversal of 51377173 is 37177315.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32524209 + 18852964 = 5703^2 + 4342^2 .

It is a cyclic number.

It is not a de Polignac number, because 51377173 - 2¹ = 51377171 is a prime.

It is a super-2 number, since 2×51377173² = 5279227810943858, which contains 22 as substring.

Together with 51377171, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51377171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25688586 + 25688587.

It is an arithmetic number, because the mean of its divisors is an integer number (25688587).

Almost surely, 2^51377173 is an apocalyptic number.

It is an amenable number.

51377173 is a deficient number, since it is larger than the sum of its proper divisors (1).

51377173 is an equidigital number, since it uses as much as digits as its factorization.

51377173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15435, while the sum is 34.

The square root of 51377173 is about 7167.7871759700. The cubic root of 51377173 is about 371.7549282855.

The spelling of 51377173 in words is "fifty-one million, three hundred seventy-seven thousand, one hundred seventy-three".