130221764 has 12 divisors (see below), whose sum is σ = 227993388. Its totient is φ = 65080800.

The previous prime is 130221743. The next prime is 130221769. The reversal of 130221764 is 467122031.

It can be written as a sum of positive squares in 2 ways, for example, as 118374400 + 11847364 = 10880^2 + 3442^2 .

It is not an unprimeable number, because it can be changed into a prime (130221769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4274 + ... + 16694.

It is an arithmetic number, because the mean of its divisors is an integer number (18999449).

Almost surely, 2^130221764 is an apocalyptic number.

It is an amenable number.

130221764 is a deficient number, since it is larger than the sum of its proper divisors (97771624).

130221764 is a wasteful number, since it uses less digits than its factorization.

130221764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15046 (or 15044 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 130221764 is about 11411.4751018438. The cubic root of 130221764 is about 506.8675924779.

Adding to 130221764 its reverse (467122031), we get a palindrome (597343795).

The spelling of 130221764 in words is "one hundred thirty million, two hundred twenty-one thousand, seven hundred sixty-four".