51013971 has 12 divisors (see below), whose sum is σ = 73750248. Its totient is φ = 33980064.

The previous prime is 51013969. The next prime is 51014027. The reversal of 51013971 is 17931015.

It is a happy number.

It is not a de Polignac number, because 51013971 - 2¹ = 51013969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51013901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15736 + ... + 18698.

It is an arithmetic number, because the mean of its divisors is an integer number (6145854).

Almost surely, 2^51013971 is an apocalyptic number.

51013971 is a deficient number, since it is larger than the sum of its proper divisors (22736277).

51013971 is a wasteful number, since it uses less digits than its factorization.

51013971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4882 (or 4879 counting only the distinct ones).

The product of its (nonzero) digits is 945, while the sum is 27.

The square root of 51013971 is about 7142.4065272148. The cubic root of 51013971 is about 370.8768368887.

Adding to 51013971 its reverse (17931015), we get a palindrome (68944986).

It can be divided in two parts, 51013 and 971, that added together give a square (51984 = 228²).

The spelling of 51013971 in words is "fifty-one million, thirteen thousand, nine hundred seventy-one".