51361311 has 8 divisors (see below), whose sum is σ = 68517424. Its totient is φ = 34223040.

The previous prime is 51361309. The next prime is 51361333. The reversal of 51361311 is 11316315.

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

It is not a de Polignac number, because 51361311 - 2¹ = 51361309 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 (51361411) 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, 5331 + ... + 11451.

It is an arithmetic number, because the mean of its divisors is an integer number (8564678).

Almost surely, 2^51361311 is an apocalyptic number.

51361311 is a deficient number, since it is larger than the sum of its proper divisors (17156113).

51361311 is a wasteful number, since it uses less digits than its factorization.

51361311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8921.

The product of its digits is 270, while the sum is 21.

The square root of 51361311 is about 7166.6806123895. The cubic root of 51361311 is about 371.7166662632.

Adding to 51361311 its reverse (11316315), we get a palindrome (62677626).

The spelling of 51361311 in words is "fifty-one million, three hundred sixty-one thousand, three hundred eleven".