51242430 has 32 divisors (see below), whose sum is σ = 129456000. Its totient is φ = 12945312.

The previous prime is 51242419. The next prime is 51242431. The reversal of 51242430 is 3424215.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51242397 and 51242406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51242431) 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, 44380 + ... + 45519.

It is an arithmetic number, because the mean of its divisors is an integer number (4045500).

Almost surely, 2^51242430 is an apocalyptic number.

51242430 is an abundant number, since it is smaller than the sum of its proper divisors (78213570).

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

51242430 is a wasteful number, since it uses less digits than its factorization.

51242430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89928.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 51242430 is about 7158.3818003792. The cubic root of 51242430 is about 371.4296526455.

Adding to 51242430 its reverse (3424215), we get a palindrome (54666645).

The spelling of 51242430 in words is "fifty-one million, two hundred forty-two thousand, four hundred thirty".