51693074 has 4 divisors (see below), whose sum is σ = 77539614. Its totient is φ = 25846536.

The previous prime is 51693067. The next prime is 51693077. The reversal of 51693074 is 47039615.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 45468049 + 6225025 = 6743^2 + 2495^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51693077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12923267 + ... + 12923270.

Almost surely, 2^51693074 is an apocalyptic number.

51693074 is a deficient number, since it is larger than the sum of its proper divisors (25846540).

51693074 is a wasteful number, since it uses less digits than its factorization.

51693074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25846539.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 51693074 is about 7189.7895657662. The cubic root of 51693074 is about 372.5153040872.

The spelling of 51693074 in words is "fifty-one million, six hundred ninety-three thousand, seventy-four".