51451356 has 24 divisors (see below), whose sum is σ = 130967424. Its totient is φ = 15591280.

The previous prime is 51451327. The next prime is 51451369. The reversal of 51451356 is 65315415.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194760 + ... + 195023.

It is an arithmetic number, because the mean of its divisors is an integer number (5456976).

Almost surely, 2^51451356 is an apocalyptic number.

It is an amenable number.

51451356 is an abundant number, since it is smaller than the sum of its proper divisors (79516068).

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

51451356 is a wasteful number, since it uses less digits than its factorization.

51451356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389801 (or 389799 counting only the distinct ones).

The product of its digits is 9000, while the sum is 30.

The square root of 51451356 is about 7172.9600584417. The cubic root of 51451356 is about 371.9337666796.

The spelling of 51451356 in words is "fifty-one million, four hundred fifty-one thousand, three hundred fifty-six".