51436416 has 32 divisors (see below), whose sum is σ = 136629000. Its totient is φ = 17145344.

The previous prime is 51436403. The next prime is 51436417. The reversal of 51436416 is 61463415.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51436417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66591 + ... + 67358.

Almost surely, 2^51436416 is an apocalyptic number.

It is an amenable number.

51436416 is an abundant number, since it is smaller than the sum of its proper divisors (85192584).

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

51436416 is a wasteful number, since it uses less digits than its factorization.

51436416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133966 (or 133954 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 51436416 is about 7171.9185717631. The cubic root of 51436416 is about 371.8977635572.

The spelling of 51436416 in words is "fifty-one million, four hundred thirty-six thousand, four hundred sixteen".