51309080 has 32 divisors (see below), whose sum is σ = 116151840. Its totient is φ = 20398080.

The previous prime is 51309079. The next prime is 51309107. The reversal of 51309080 is 8090315.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2840 + ... + 10520.

It is an arithmetic number, because the mean of its divisors is an integer number (3629745).

Almost surely, 2^51309080 is an apocalyptic number.

It is an amenable number.

51309080 is an abundant number, since it is smaller than the sum of its proper divisors (64842760).

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

51309080 is a wasteful number, since it uses less digits than its factorization.

51309080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7859 (or 7855 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 51309080 is about 7163.0356693234. The cubic root of 51309080 is about 371.5906199076.

Adding to 51309080 its reverse (8090315), we get a palindrome (59399395).

The spelling of 51309080 in words is "fifty-one million, three hundred nine thousand, eighty".