51480312 has 32 divisors (see below), whose sum is σ = 138601680. Its totient is φ = 15840000.

The previous prime is 51480311. The next prime is 51480323. The reversal of 51480312 is 21308415.

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 (51480311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82189 + ... + 82812.

Almost surely, 2^51480312 is an apocalyptic number.

51480312 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

51480312 is an abundant number, since it is smaller than the sum of its proper divisors (87121368).

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

51480312 is a wasteful number, since it uses less digits than its factorization.

51480312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165023 (or 165019 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 51480312 is about 7174.9781881202. The cubic root of 51480312 is about 372.0035263858.

Adding to 51480312 its reverse (21308415), we get a palindrome (72788727).

The spelling of 51480312 in words is "fifty-one million, four hundred eighty thousand, three hundred twelve".