51881002 has 16 divisors (see below), whose sum is σ = 78675840. Its totient is φ = 25657632.

The previous prime is 51880987. The next prime is 51881003. The reversal of 51881002 is 20018815.

It is not an unprimeable number, because it can be changed into a prime (51881003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111823 + ... + 112285.

It is an arithmetic number, because the mean of its divisors is an integer number (4917240).

Almost surely, 2^51881002 is an apocalyptic number.

51881002 is a deficient number, since it is larger than the sum of its proper divisors (26794838).

51881002 is a wasteful number, since it uses less digits than its factorization.

51881002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957.

The product of its (nonzero) digits is 640, while the sum is 25.

The square root of 51881002 is about 7202.8467983152. The cubic root of 51881002 is about 372.9661793973.

Adding to 51881002 its reverse (20018815), we get a palindrome (71899817).

The spelling of 51881002 in words is "fifty-one million, eight hundred eighty-one thousand, two".