51211441 has 16 divisors (see below), whose sum is σ = 56008960. Its totient is φ = 46656000.

The previous prime is 51211439. The next prime is 51211451. The reversal of 51211441 is 14411215.

51211441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a 3-Lehmer number, since φ(51211441) divides (51211441-1)³.

It is a cyclic number.

It is not a de Polignac number, because 51211441 - 2¹ = 51211439 is a prime.

It is a super-2 number, since 2×51211441² = 5245223378592962, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (51211421) 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, 67816 + ... + 68566.

It is an arithmetic number, because the mean of its divisors is an integer number (3500560).

Almost surely, 2^51211441 is an apocalyptic number.

It is an amenable number.

51211441 is a deficient number, since it is larger than the sum of its proper divisors (4797519).

51211441 is a wasteful number, since it uses less digits than its factorization.

51211441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904.

The product of its digits is 160, while the sum is 19.

The square root of 51211441 is about 7156.2169475219. The cubic root of 51211441 is about 371.3547631801.

Adding to 51211441 its reverse (14411215), we get a palindrome (65622656).

The spelling of 51211441 in words is "fifty-one million, two hundred eleven thousand, four hundred forty-one".