51205424 has 10 divisors (see below), whose sum is σ = 99210540. Its totient is φ = 25602704.

The previous prime is 51205423. The next prime is 51205463. The reversal of 51205424 is 42450215.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 51205424.

It is not an unprimeable number, because it can be changed into a prime (51205423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1600154 + ... + 1600185.

It is an arithmetic number, because the mean of its divisors is an integer number (9921054).

Almost surely, 2^51205424 is an apocalyptic number.

It is an amenable number.

51205424 is a deficient number, since it is larger than the sum of its proper divisors (48005116).

51205424 is a wasteful number, since it uses less digits than its factorization.

51205424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3200347 (or 3200341 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 51205424 is about 7155.7965314841. The cubic root of 51205424 is about 371.3402187145.

Adding to 51205424 its reverse (42450215), we get a palindrome (93655639).

The spelling of 51205424 in words is "fifty-one million, two hundred five thousand, four hundred twenty-four".