51663374 has 36 divisors (see below), whose sum is σ = 94921944. Its totient is φ = 20654592.

The previous prime is 51663371. The next prime is 51663383. The reversal of 51663374 is 47336615.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51663371) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 457142 + ... + 457254.

Almost surely, 2^51663374 is an apocalyptic number.

51663374 is a deficient number, since it is larger than the sum of its proper divisors (43258570).

51663374 is a wasteful number, since it uses less digits than its factorization.

51663374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269 (or 139 counting only the distinct ones).

The product of its digits is 45360, while the sum is 35.

The square root of 51663374 is about 7187.7238399927. The cubic root of 51663374 is about 372.4439481446.

Adding to 51663374 its reverse (47336615), we get a palindrome (98999989).

The spelling of 51663374 in words is "fifty-one million, six hundred sixty-three thousand, three hundred seventy-four".