51395494 has 16 divisors (see below), whose sum is σ = 81327600. Its totient is φ = 24292224.

The previous prime is 51395473. The next prime is 51395497. The reversal of 51395494 is 49459315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51395497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20434 + ... + 22810.

It is an arithmetic number, because the mean of its divisors is an integer number (5082975).

Almost surely, 2^51395494 is an apocalyptic number.

51395494 is a deficient number, since it is larger than the sum of its proper divisors (29932106).

51395494 is a wasteful number, since it uses less digits than its factorization.

51395494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2967.

The product of its digits is 97200, while the sum is 40.

The square root of 51395494 is about 7169.0650715418. The cubic root of 51395494 is about 371.7991120622.

The spelling of 51395494 in words is "fifty-one million, three hundred ninety-five thousand, four hundred ninety-four".