51142312 has 64 divisors (see below), whose sum is σ = 110476800. Its totient is φ = 22014720.

The previous prime is 51142303. The next prime is 51142361. The reversal of 51142312 is 21324115.

51142312 = T₂₁₈ + T₂₁₉ + ... + T₆₈₁.

It is a self number, because there is not a number n which added to its sum of digits gives 51142312.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93223 + ... + 93769.

It is an arithmetic number, because the mean of its divisors is an integer number (1726200).

Almost surely, 2^51142312 is an apocalyptic number.

51142312 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51142312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55238400).

51142312 is an abundant number, since it is smaller than the sum of its proper divisors (59334488).

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

51142312 is a wasteful number, since it uses less digits than its factorization.

51142312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626 (or 622 counting only the distinct ones).

The product of its digits is 240, while the sum is 19.

The square root of 51142312 is about 7151.3853203418. The cubic root of 51142312 is about 371.1875938742.

Adding to 51142312 its reverse (21324115), we get a palindrome (72466427).

The spelling of 51142312 in words is "fifty-one million, one hundred forty-two thousand, three hundred twelve".