51230394 has 40 divisors (see below), whose sum is σ = 116276160. Its totient is φ = 16856424.

The previous prime is 51230393. The next prime is 51230419. The reversal of 51230394 is 49303215.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (51230393) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10797 + ... + 14799.

It is an arithmetic number, because the mean of its divisors is an integer number (2906904).

Almost surely, 2^51230394 is an apocalyptic number.

51230394 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51230394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58138080).

51230394 is an abundant number, since it is smaller than the sum of its proper divisors (65045766).

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

51230394 is a wasteful number, since it uses less digits than its factorization.

51230394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4096 (or 4087 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 51230394 is about 7157.5410582127. The cubic root of 51230394 is about 371.4005694725.

The spelling of 51230394 in words is "fifty-one million, two hundred thirty thousand, three hundred ninety-four".