51453312 has 32 divisors (see below), whose sum is σ = 136673880. Its totient is φ = 17150976.

The previous prime is 51453257. The next prime is 51453313. The reversal of 51453312 is 21335415.

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

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51453313) 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, 66613 + ... + 67380.

Almost surely, 2^51453312 is an apocalyptic number.

It is an amenable number.

51453312 is an abundant number, since it is smaller than the sum of its proper divisors (85220568).

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

51453312 is a wasteful number, since it uses less digits than its factorization.

51453312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134010 (or 133998 counting only the distinct ones).

The product of its digits is 1800, while the sum is 24.

The square root of 51453312 is about 7173.0964025308. The cubic root of 51453312 is about 371.9384798254.

Adding to 51453312 its reverse (21335415), we get a palindrome (72788727).

The spelling of 51453312 in words is "fifty-one million, four hundred fifty-three thousand, three hundred twelve".