51663436 has 24 divisors (see below), whose sum is σ = 98899920. Its totient is φ = 23419200.

The previous prime is 51663431. The next prime is 51663439. The reversal of 51663436 is 63436615.

It is a super-2 number, since 2×51663436² = 5338221238652192, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51663431) 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, 17130 + ... + 19918.

It is an arithmetic number, because the mean of its divisors is an integer number (4120830).

Almost surely, 2^51663436 is an apocalyptic number.

It is an amenable number.

51663436 is a deficient number, since it is larger than the sum of its proper divisors (47236484).

51663436 is a wasteful number, since it uses less digits than its factorization.

51663436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3225 (or 3223 counting only the distinct ones).

The product of its digits is 38880, while the sum is 34.

The square root of 51663436 is about 7187.7281529006. The cubic root of 51663436 is about 372.4440971316. Note that the first 3 decimals are identical.

The spelling of 51663436 in words is "fifty-one million, six hundred sixty-three thousand, four hundred thirty-six".