51975578 has 8 divisors (see below), whose sum is σ = 79284960. Its totient is φ = 25547260.

The previous prime is 51975557. The next prime is 51975611. The reversal of 51975578 is 87557915.

It is a happy number.

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, 220118 + ... + 220353.

It is an arithmetic number, because the mean of its divisors is an integer number (9910620).

Almost surely, 2^51975578 is an apocalyptic number.

51975578 is a deficient number, since it is larger than the sum of its proper divisors (27309382).

51975578 is a wasteful number, since it uses less digits than its factorization.

51975578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440532.

The product of its digits is 441000, while the sum is 47.

The square root of 51975578 is about 7209.4089910339. The cubic root of 51975578 is about 373.1926735909.

The spelling of 51975578 in words is "fifty-one million, nine hundred seventy-five thousand, five hundred seventy-eight".