51846642 has 20 divisors (see below), whose sum is σ = 116175246. Its totient is φ = 17282160.

The previous prime is 51846637. The next prime is 51846647. The reversal of 51846642 is 24664815.

51846642 is a `hidden beast` number, since 5 + 1 + 8 + 4 + 6 + 642 = 666.

It is an interprime number because it is at equal distance from previous prime (51846637) and next prime (51846647).

It can be written as a sum of positive squares in only one way, i.e., 51710481 + 136161 = 7191^2 + 369^2 .

It is a super-3 number, since 3×51846642³ (a number of 24 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51846597 and 51846606.

It is not an unprimeable number, because it can be changed into a prime (51846647) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 159859 + ... + 160182.

Almost surely, 2^51846642 is an apocalyptic number.

51846642 is an abundant number, since it is smaller than the sum of its proper divisors (64328604).

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

51846642 is a wasteful number, since it uses less digits than its factorization.

51846642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320055 (or 320046 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 51846642 is about 7200.4612352265. The cubic root of 51846642 is about 372.8838246010.

The spelling of 51846642 in words is "fifty-one million, eight hundred forty-six thousand, six hundred forty-two".