51379894 has 8 divisors (see below), whose sum is σ = 77333760. Its totient is φ = 25601976.

The previous prime is 51379879. The next prime is 51379897. The reversal of 51379894 is 49897315.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51379897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43254 + ... + 44425.

It is an arithmetic number, because the mean of its divisors is an integer number (9666720).

Almost surely, 2^51379894 is an apocalyptic number.

51379894 is a deficient number, since it is larger than the sum of its proper divisors (25953866).

51379894 is a wasteful number, since it uses less digits than its factorization.

51379894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87974.

The product of its digits is 272160, while the sum is 46.

The square root of 51379894 is about 7167.9769809898. The cubic root of 51379894 is about 371.7614910399.

The spelling of 51379894 in words is "fifty-one million, three hundred seventy-nine thousand, eight hundred ninety-four".