51675642 has 24 divisors (see below), whose sum is σ = 112466016. Its totient is φ = 17147976.

The previous prime is 51675599. The next prime is 51675647. The reversal of 51675642 is 24657615.

It is a happy number.

51675642 is a `hidden beast` number, since 5 + 1 + 6 + 7 + 5 + 642 = 666.

It is a super-2 number, since 2×51675642² = 5340743952224328, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 51675597 and 51675606.

It is not an unprimeable number, because it can be changed into a prime (51675647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2238 + ... + 10409.

It is an arithmetic number, because the mean of its divisors is an integer number (4686084).

Almost surely, 2^51675642 is an apocalyptic number.

51675642 is an abundant number, since it is smaller than the sum of its proper divisors (60790374).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51675642 is a wasteful number, since it uses less digits than its factorization.

51675642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12882 (or 12879 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 51675642 is about 7188.5771888462. The cubic root of 51675642 is about 372.4734260279.

The spelling of 51675642 in words is "fifty-one million, six hundred seventy-five thousand, six hundred forty-two".