51161378 has 8 divisors (see below), whose sum is σ = 78042960. Its totient is φ = 25147060.

The previous prime is 51161359. The next prime is 51161387. The reversal of 51161378 is 87316115.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216668 + ... + 216903.

It is an arithmetic number, because the mean of its divisors is an integer number (9755370).

Almost surely, 2^51161378 is an apocalyptic number.

51161378 is a deficient number, since it is larger than the sum of its proper divisors (26881582).

51161378 is a wasteful number, since it uses less digits than its factorization.

51161378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433632.

The product of its digits is 5040, while the sum is 32.

The square root of 51161378 is about 7152.7182245633. The cubic root of 51161378 is about 371.2337147417.

The spelling of 51161378 in words is "fifty-one million, one hundred sixty-one thousand, three hundred seventy-eight".