51225111 has 12 divisors (see below), whose sum is σ = 84562192. Its totient is φ = 29271456.

The previous prime is 51225067. The next prime is 51225143. The reversal of 51225111 is 11152215.

It is not a de Polignac number, because 51225111 - 2⁹ = 51224599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51225611) 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, 406486 + ... + 406611.

Almost surely, 2^51225111 is an apocalyptic number.

51225111 is a deficient number, since it is larger than the sum of its proper divisors (33337081).

51225111 is a wasteful number, since it uses less digits than its factorization.

51225111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813110 (or 813107 counting only the distinct ones).

The product of its digits is 100, while the sum is 18.

The square root of 51225111 is about 7157.1719973744. The cubic root of 51225111 is about 371.3878024638.

Adding to 51225111 its reverse (11152215), we get a palindrome (62377326).

The spelling of 51225111 in words is "fifty-one million, two hundred twenty-five thousand, one hundred eleven".