51451036 has 72 divisors (see below), whose sum is σ = 113629824. Its totient is φ = 19955520.

The previous prime is 51451021. The next prime is 51451039. The reversal of 51451036 is 63015415.

It is a self number, because there is not a number n which added to its sum of digits gives 51451036.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51451039) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 392691 + ... + 392821.

It is an arithmetic number, because the mean of its divisors is an integer number (1578192).

Almost surely, 2^51451036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51451036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56814912).

51451036 is an abundant number, since it is smaller than the sum of its proper divisors (62178788).

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

51451036 is a wasteful number, since it uses less digits than its factorization.

51451036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 51451036 is about 7172.9377524136. The cubic root of 51451036 is about 371.9329956014.

The spelling of 51451036 in words is "fifty-one million, four hundred fifty-one thousand, thirty-six".