51495210 has 128 divisors (see below), whose sum is σ = 156764160. Its totient is φ = 11916288.

The previous prime is 51495181. The next prime is 51495211. The reversal of 51495210 is 1259415.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (51495211) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 59239 + ... + 60101.

It is an arithmetic number, because the mean of its divisors is an integer number (1224720).

Almost surely, 2^51495210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51495210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78382080).

51495210 is an abundant number, since it is smaller than the sum of its proper divisors (105268950).

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

51495210 is a wasteful number, since it uses less digits than its factorization.

51495210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909 (or 903 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 51495210 is about 7176.0163043293. The cubic root of 51495210 is about 372.0394078959.

The spelling of 51495210 in words is "fifty-one million, four hundred ninety-five thousand, two hundred ten".