221140004 has 6 divisors (see below), whose sum is σ = 386995014. Its totient is φ = 110570000.

The previous prime is 221139973. The next prime is 221140043. The reversal of 221140004 is 400041122.

It can be written as a sum of positive squares in only one way, i.e., 221116900 + 23104 = 14870^2 + 152^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27642497 + ... + 27642504.

It is an arithmetic number, because the mean of its divisors is an integer number (64499169).

Almost surely, 2^221140004 is an apocalyptic number.

It is an amenable number.

221140004 is a deficient number, since it is larger than the sum of its proper divisors (165855010).

221140004 is a wasteful number, since it uses less digits than its factorization.

221140004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55285005 (or 55285003 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 221140004 is about 14870.7768458813. The cubic root of 221140004 is about 604.7220032824.

Adding to 221140004 its reverse (400041122), we get a palindrome (621181126).

The spelling of 221140004 in words is "two hundred twenty-one million, one hundred forty thousand, four".