51100780 has 24 divisors (see below), whose sum is σ = 107446752. Its totient is φ = 20414592.

The previous prime is 51100771. The next prime is 51100783. The reversal of 51100780 is 8700115.

It is a super-2 number, since 2×51100780² = 5222579433216800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51100783) 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, 27769 + ... + 29551.

It is an arithmetic number, because the mean of its divisors is an integer number (4476948).

Almost surely, 2^51100780 is an apocalyptic number.

It is an amenable number.

51100780 is an abundant number, since it is smaller than the sum of its proper divisors (56345972).

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

51100780 is a wasteful number, since it uses less digits than its factorization.

51100780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3225 (or 3223 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 22.

The square root of 51100780 is about 7148.4809575182. The cubic root of 51100780 is about 371.0870878058.

Adding to 51100780 its reverse (8700115), we get a palindrome (59800895).

The spelling of 51100780 in words is "fifty-one million, one hundred thousand, seven hundred eighty".