51449972 has 24 divisors (see below), whose sum is σ = 103540416. Its totient is φ = 21912768.

The previous prime is 51449971. The next prime is 51449977. The reversal of 51449972 is 27994415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51449971) 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, 1073 + ... + 10200.

It is an arithmetic number, because the mean of its divisors is an integer number (4314184).

Almost surely, 2^51449972 is an apocalyptic number.

It is an amenable number.

51449972 is an abundant number, since it is smaller than the sum of its proper divisors (52090444).

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

51449972 is a wasteful number, since it uses less digits than its factorization.

51449972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11447 (or 11445 counting only the distinct ones).

The product of its digits is 90720, while the sum is 41.

The square root of 51449972 is about 7172.8635843713. The cubic root of 51449972 is about 371.9304317435.

The spelling of 51449972 in words is "fifty-one million, four hundred forty-nine thousand, nine hundred seventy-two".