51220141 has 6 divisors (see below), whose sum is σ = 59582670. Its totient is φ = 43902936.

The previous prime is 51220139. The next prime is 51220159. The reversal of 51220141 is 14102215.

It can be written as a sum of positive squares in only one way, i.e., 33756100 + 17464041 = 5810^2 + 4179^2 .

It is not a de Polignac number, because 51220141 - 2¹ = 51220139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51229141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 522606 + ... + 522703.

It is an arithmetic number, because the mean of its divisors is an integer number (9930445).

Almost surely, 2^51220141 is an apocalyptic number.

It is an amenable number.

51220141 is a deficient number, since it is larger than the sum of its proper divisors (8362529).

51220141 is a wasteful number, since it uses less digits than its factorization.

51220141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045323 (or 1045316 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 51220141 is about 7156.8247847771. The cubic root of 51220141 is about 371.3757910561.

Adding to 51220141 its reverse (14102215), we get a palindrome (65322356).

The spelling of 51220141 in words is "fifty-one million, two hundred twenty thousand, one hundred forty-one".