51380380 has 24 divisors (see below), whose sum is σ = 110532240. Its totient is φ = 20050560.

The previous prime is 51380369. The next prime is 51380429. The reversal of 51380380 is 8308315.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30510 + ... + 32149.

It is an arithmetic number, because the mean of its divisors is an integer number (4605510).

Almost surely, 2^51380380 is an apocalyptic number.

It is an amenable number.

51380380 is an abundant number, since it is smaller than the sum of its proper divisors (59151860).

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

51380380 is a wasteful number, since it uses less digits than its factorization.

51380380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62709 (or 62707 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 51380380 is about 7168.0108816882. The cubic root of 51380380 is about 371.7626631944.

Adding to 51380380 its reverse (8308315), we get a palindrome (59688695).

The spelling of 51380380 in words is "fifty-one million, three hundred eighty thousand, three hundred eighty".