51132261 has 16 divisors (see below), whose sum is σ = 70313984. Its totient is φ = 33027264.

The previous prime is 51132259. The next prime is 51132271. The reversal of 51132261 is 16223115.

51132261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51132261 - 2¹ = 51132259 is a prime.

It is a super-2 number, since 2×51132261² = 5229016229944242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51132271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29916 + ... + 31578.

It is an arithmetic number, because the mean of its divisors is an integer number (4394624).

Almost surely, 2^51132261 is an apocalyptic number.

It is an amenable number.

51132261 is a deficient number, since it is larger than the sum of its proper divisors (19181723).

51132261 is a wasteful number, since it uses less digits than its factorization.

51132261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1980.

The product of its digits is 360, while the sum is 21.

The square root of 51132261 is about 7150.6825548335. The cubic root of 51132261 is about 371.1632757783.

Adding to 51132261 its reverse (16223115), we get a palindrome (67355376).

The spelling of 51132261 in words is "fifty-one million, one hundred thirty-two thousand, two hundred sixty-one".