51242712 has 32 divisors (see below), whose sum is σ = 133678080. Its totient is φ = 16338080.

The previous prime is 51242701. The next prime is 51242717. The reversal of 51242712 is 21724215.

It is a super-2 number, since 2×51242712² = 5251631066229888, which contains 22 as substring.

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 (51242717) 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, 45864 + ... + 46967.

It is an arithmetic number, because the mean of its divisors is an integer number (4177440).

Almost surely, 2^51242712 is an apocalyptic number.

It is an amenable number.

51242712 is an abundant number, since it is smaller than the sum of its proper divisors (82435368).

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

51242712 is a wasteful number, since it uses less digits than its factorization.

51242712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92863 (or 92859 counting only the distinct ones).

The product of its digits is 1120, while the sum is 24.

The square root of 51242712 is about 7158.4014975412. The cubic root of 51242712 is about 371.4303340012.

Adding to 51242712 its reverse (21724215), we get a palindrome (72966927).

The spelling of 51242712 in words is "fifty-one million, two hundred forty-two thousand, seven hundred twelve".