51543632 has 20 divisors (see below), whose sum is σ = 114132576. Its totient is φ = 22090080.

The previous prime is 51543623. The next prime is 51543641. The reversal of 51543632 is 23634515.

It is an interprime number because it is at equal distance from previous prime (51543623) and next prime (51543641).

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 51543595 and 51543604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 229994 + ... + 230217.

Almost surely, 2^51543632 is an apocalyptic number.

It is an amenable number.

51543632 is an abundant number, since it is smaller than the sum of its proper divisors (62588944).

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

51543632 is a wasteful number, since it uses less digits than its factorization.

51543632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460226 (or 460220 counting only the distinct ones).

The product of its digits is 10800, while the sum is 29.

The square root of 51543632 is about 7179.3893890776. The cubic root of 51543632 is about 372.1559834542.

The spelling of 51543632 in words is "fifty-one million, five hundred forty-three thousand, six hundred thirty-two".