51370380 has 72 divisors (see below), whose sum is σ = 159471312. Its totient is φ = 13378176.

The previous prime is 51370349. The next prime is 51370391. The reversal of 51370380 is 8307315.

51370380 is a `hidden beast` number, since 513 + 70 + 3 + 80 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4422 + ... + 11058.

Almost surely, 2^51370380 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 51370380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79735656).

51370380 is an abundant number, since it is smaller than the sum of its proper divisors (108100932).

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

51370380 is a wasteful number, since it uses less digits than its factorization.

51370380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6695 (or 6690 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 51370380 is about 7167.3133041608. The cubic root of 51370380 is about 371.7385433011.

Adding to 51370380 its reverse (8307315), we get a palindrome (59677695).

The spelling of 51370380 in words is "fifty-one million, three hundred seventy thousand, three hundred eighty".