51132311 has 4 divisors (see below), whose sum is σ = 54140112. Its totient is φ = 48124512.

The previous prime is 51132293. The next prime is 51132317. The reversal of 51132311 is 11323115.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11323115 = 5 ⋅2264623.

It is a cyclic number.

It is not a de Polignac number, because 51132311 - 2¹⁴ = 51115927 is a prime.

It is a super-2 number, since 2×51132311² = 5229026456401442, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 3007783 = 51132311 / (5 + 1 + 1 + 3 + 2 + 3 + 1 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51132311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51132317) 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, 1503875 + ... + 1503908.

It is an arithmetic number, because the mean of its divisors is an integer number (13535028).

Almost surely, 2^51132311 is an apocalyptic number.

51132311 is a deficient number, since it is larger than the sum of its proper divisors (3007801).

51132311 is a wasteful number, since it uses less digits than its factorization.

51132311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3007800.

The product of its digits is 90, while the sum is 17.

The square root of 51132311 is about 7150.6860510024. The cubic root of 51132311 is about 371.1633967597.

Adding to 51132311 its reverse (11323115), we get a palindrome (62455426).

The spelling of 51132311 in words is "fifty-one million, one hundred thirty-two thousand, three hundred eleven".