51299430 has 256 divisors, whose sum is σ = 170311680. Its totient is φ = 9580032.

The previous prime is 51299429. The next prime is 51299441. The reversal of 51299430 is 3499215.

It is a junction number, because it is equal to n+sod(n) for n = 51299391 and 51299400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1192989 + ... + 1193031.

It is an arithmetic number, because the mean of its divisors is an integer number (665280).

Almost surely, 2^51299430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51299430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85155840).

51299430 is an abundant number, since it is smaller than the sum of its proper divisors (119012250).

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

51299430 is a wasteful number, since it uses less digits than its factorization.

51299430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 51299430 is about 7162.3620405562. The cubic root of 51299430 is about 371.5673227036.

The spelling of 51299430 in words is "fifty-one million, two hundred ninety-nine thousand, four hundred thirty".