51422511 has 12 divisors (see below), whose sum is σ = 79757592. Its totient is φ = 29384208.

The previous prime is 51422491. The next prime is 51422533. The reversal of 51422511 is 11522415.

It is not a de Polignac number, because 51422511 - 2⁵ = 51422479 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51422551) 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, 174760 + ... + 175053.

It is an arithmetic number, because the mean of its divisors is an integer number (6646466).

Almost surely, 2^51422511 is an apocalyptic number.

51422511 is a deficient number, since it is larger than the sum of its proper divisors (28335081).

51422511 is a wasteful number, since it uses less digits than its factorization.

51422511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349830 (or 349823 counting only the distinct ones).

The product of its digits is 400, while the sum is 21.

The square root of 51422511 is about 7170.9491003632. The cubic root of 51422511 is about 371.8642483627.

Adding to 51422511 its reverse (11522415), we get a palindrome (62944926).

The spelling of 51422511 in words is "fifty-one million, four hundred twenty-two thousand, five hundred eleven".