51378330 has 32 divisors (see below), whose sum is σ = 126318528. Its totient is φ = 13366400.

The previous prime is 51378323. The next prime is 51378391. The reversal of 51378330 is 3387315.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19656 + ... + 22115.

It is an arithmetic number, because the mean of its divisors is an integer number (3947454).

Almost surely, 2^51378330 is an apocalyptic number.

51378330 is an abundant number, since it is smaller than the sum of its proper divisors (74940198).

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

51378330 is a wasteful number, since it uses less digits than its factorization.

51378330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41822.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 51378330 is about 7167.8678838271. The cubic root of 51378330 is about 371.7577188713.

The spelling of 51378330 in words is "fifty-one million, three hundred seventy-eight thousand, three hundred thirty".