51506010 has 32 divisors (see below), whose sum is σ = 137350080. Its totient is φ = 13734864.

The previous prime is 51506003. The next prime is 51506011. The reversal of 51506010 is 1060515.

It is a super-2 number, since 2×51506010² = 5305738132240200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (51506011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95112 + ... + 95651.

It is an arithmetic number, because the mean of its divisors is an integer number (4292190).

Almost surely, 2^51506010 is an apocalyptic number.

51506010 is an abundant number, since it is smaller than the sum of its proper divisors (85844070).

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

51506010 is a wasteful number, since it uses less digits than its factorization.

51506010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190779 (or 190773 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 51506010 is about 7176.7687715294. The cubic root of 51506010 is about 372.0654151352.

Adding to 51506010 its reverse (1060515), we get a palindrome (52566525).

The spelling of 51506010 in words is "fifty-one million, five hundred six thousand, ten".