221772546162004 has 24 divisors (see below), whose sum is σ = 388599685340328. Its totient is φ = 110744072355840.

The previous prime is 221772546161989. The next prime is 221772546162107. The reversal of 221772546162004 is 400261645277122.

It can be written as a sum of positive squares in 4 ways, for example, as 25502197000900 + 196270349161104 = 5049970^2 + 14009652^2 .

It is a super-2 number, since 2×221772546162004² (a number of 29 digits) contains 22 as substring.

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, 116247892 + ... + 118140244.

It is an arithmetic number, because the mean of its divisors is an integer number (16191653555847).

Almost surely, 2^{221772546162004} is an apocalyptic number.

It is an amenable number.

221772546162004 is a deficient number, since it is larger than the sum of its proper divisors (166827139178324).

221772546162004 is a wasteful number, since it uses less digits than its factorization.

221772546162004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1929915 (or 1929913 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 49.

The spelling of 221772546162004 in words is "two hundred twenty-one trillion, seven hundred seventy-two billion, five hundred forty-six million, one hundred sixty-two thousand, four".