51224604 has 48 divisors (see below), whose sum is σ = 127135008. Its totient is φ = 15996928.

The previous prime is 51224603. The next prime is 51224623. The reversal of 51224604 is 40642215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51224603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59344 + ... + 60200.

It is an arithmetic number, because the mean of its divisors is an integer number (2648646).

Almost surely, 2^51224604 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51224604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63567504).

51224604 is an abundant number, since it is smaller than the sum of its proper divisors (75910404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51224604 is a wasteful number, since it uses less digits than its factorization.

51224604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174 (or 1172 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 51224604 is about 7157.1365782693. The cubic root of 51224604 is about 371.3865771908.

Adding to 51224604 its reverse (40642215), we get a palindrome (91866819).

The spelling of 51224604 in words is "fifty-one million, two hundred twenty-four thousand, six hundred four".