51002010 has 48 divisors (see below), whose sum is σ = 137184840. Its totient is φ = 13130880.

The previous prime is 51001997. The next prime is 51002011. The reversal of 51002010 is 1020015.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 35533521 + 15468489 = 5961^2 + 3933^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 51001983 and 51002001.

It is not an unprimeable number, because it can be changed into a prime (51002011) 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, 7161 + ... + 12380.

Almost surely, 2^51002010 is an apocalyptic number.

51002010 is an abundant number, since it is smaller than the sum of its proper divisors (86182830).

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

51002010 is a wasteful number, since it uses less digits than its factorization.

51002010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19583 (or 19580 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 51002010 is about 7141.5691553047. The cubic root of 51002010 is about 370.8478487213.

Adding to 51002010 its reverse (1020015), we get a palindrome (52022025).

The spelling of 51002010 in words is "fifty-one million, two thousand, ten".