221769311450 has 24 divisors (see below), whose sum is σ = 412730482368. Its totient is φ = 88656205680.

The previous prime is 221769311381. The next prime is 221769311461. The reversal of 221769311450 is 54113967122.

It is a super-2 number, since 2×221769311450² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221769311398 and 221769311407.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1200962 + ... + 1373261.

It is an arithmetic number, because the mean of its divisors is an integer number (17197103432).

Almost surely, 2^221769311450 is an apocalyptic number.

221769311450 is a deficient number, since it is larger than the sum of its proper divisors (190961170918).

221769311450 is a wasteful number, since it uses less digits than its factorization.

221769311450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2575958 (or 2575953 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 221769311450 in words is "two hundred twenty-one billion, seven hundred sixty-nine million, three hundred eleven thousand, four hundred fifty".