51277481 has 8 divisors (see below), whose sum is σ = 53344200. Its totient is φ = 49230720.

The previous prime is 51277459. The next prime is 51277487. The reversal of 51277481 is 18477215.

It can be written as a sum of positive squares in 4 ways, for example, as 11881 + 51265600 = 109^2 + 7160^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51277481 - 2¹⁰ = 51276457 is a prime.

It is a super-2 number, since 2×51277481² = 5258760115410722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51277487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365 + ... + 10133.

It is an arithmetic number, because the mean of its divisors is an integer number (6668025).

Almost surely, 2^51277481 is an apocalyptic number.

It is an amenable number.

51277481 is a deficient number, since it is larger than the sum of its proper divisors (2066719).

51277481 is a wasteful number, since it uses less digits than its factorization.

51277481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9979.

The product of its digits is 15680, while the sum is 35.

The square root of 51277481 is about 7160.8296307062. The cubic root of 51277481 is about 371.5143221499.

The spelling of 51277481 in words is "fifty-one million, two hundred seventy-seven thousand, four hundred eighty-one".