51694495 has 4 divisors (see below), whose sum is σ = 62033400. Its totient is φ = 41355592.

The previous prime is 51694477. The next prime is 51694499. The reversal of 51694495 is 59449615.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 59449615 = 5 ⋅11889923.

It is a cyclic number.

It is not a de Polignac number, because 51694495 - 2¹⁷ = 51563423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51694499) 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, 5169445 + ... + 5169454.

It is an arithmetic number, because the mean of its divisors is an integer number (15508350).

Almost surely, 2^51694495 is an apocalyptic number.

51694495 is a deficient number, since it is larger than the sum of its proper divisors (10338905).

51694495 is a wasteful number, since it uses less digits than its factorization.

51694495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10338904.

The product of its digits is 194400, while the sum is 43.

The square root of 51694495 is about 7189.8883857818. Note that the first 3 decimals coincide. The cubic root of 51694495 is about 372.5187174355.

The spelling of 51694495 in words is "fifty-one million, six hundred ninety-four thousand, four hundred ninety-five".