51421414 has 16 divisors (see below), whose sum is σ = 85525776. Its totient is φ = 22989600.

The previous prime is 51421369. The next prime is 51421417. The reversal of 51421414 is 41412415.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51421417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17817 + ... + 20500.

It is an arithmetic number, because the mean of its divisors is an integer number (5345361).

Almost surely, 2^51421414 is an apocalyptic number.

51421414 is a deficient number, since it is larger than the sum of its proper divisors (34104362).

51421414 is a wasteful number, since it uses less digits than its factorization.

51421414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38391.

The product of its digits is 640, while the sum is 22.

The square root of 51421414 is about 7170.8726107776. The cubic root of 51421414 is about 371.8616040087.

Adding to 51421414 its reverse (41412415), we get a palindrome (92833829).

It can be divided in two parts, 5142 and 1414, that added together give a palindrome (6556).

The spelling of 51421414 in words is "fifty-one million, four hundred twenty-one thousand, four hundred fourteen".