51369277 has 4 divisors (see below), whose sum is σ = 51589980. Its totient is φ = 51148576.

The previous prime is 51369239. The next prime is 51369319. The reversal of 51369277 is 77296315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77296315 = 5 ⋅15459263.

It can be written as a sum of positive squares in 2 ways, for example, as 4186116 + 47183161 = 2046^2 + 6869^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51369277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51369677) 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, 110002 + ... + 110467.

It is an arithmetic number, because the mean of its divisors is an integer number (12897495).

Almost surely, 2^51369277 is an apocalyptic number.

It is an amenable number.

51369277 is a deficient number, since it is larger than the sum of its proper divisors (220703).

51369277 is a wasteful number, since it uses less digits than its factorization.

51369277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220702.

The product of its digits is 79380, while the sum is 40.

The square root of 51369277 is about 7167.2363572021. The cubic root of 51369277 is about 371.7358826852.

The spelling of 51369277 in words is "fifty-one million, three hundred sixty-nine thousand, two hundred seventy-seven".