51433040 has 40 divisors (see below), whose sum is σ = 122135040. Its totient is φ = 20134016.

The previous prime is 51433033. The next prime is 51433051. The reversal of 51433040 is 4033415.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3080 + ... + 10599.

It is an arithmetic number, because the mean of its divisors is an integer number (3053376).

Almost surely, 2^51433040 is an apocalyptic number.

It is an amenable number.

51433040 is an abundant number, since it is smaller than the sum of its proper divisors (70702000).

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

51433040 is a wasteful number, since it uses less digits than its factorization.

51433040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13739 (or 13733 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 51433040 is about 7171.6832054965. The cubic root of 51433040 is about 371.8896269463.

Adding to 51433040 its reverse (4033415), we get a palindrome (55466455).

The spelling of 51433040 in words is "fifty-one million, four hundred thirty-three thousand, forty".