51451612 has 24 divisors (see below), whose sum is σ = 91929600. Its totient is φ = 25191936.

The previous prime is 51451577. The next prime is 51451619. The reversal of 51451612 is 21615415.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51451619) 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, 39589 + ... + 40867.

It is an arithmetic number, because the mean of its divisors is an integer number (3830400).

Almost surely, 2^51451612 is an apocalyptic number.

It is an amenable number.

51451612 is a deficient number, since it is larger than the sum of its proper divisors (40477988).

51451612 is a wasteful number, since it uses less digits than its factorization.

51451612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1485 (or 1483 counting only the distinct ones).

The product of its digits is 1200, while the sum is 25.

The square root of 51451612 is about 7172.9779032143. The cubic root of 51451612 is about 371.9343835398.

The spelling of 51451612 in words is "fifty-one million, four hundred fifty-one thousand, six hundred twelve".