221431426042756 has 24 divisors (see below), whose sum is σ = 388074615134976. Its totient is φ = 110553064278720.

The previous prime is 221431426042747. The next prime is 221431426042831. The reversal of 221431426042756 is 657240624134122.

It is a super-4 number, since 4×221431426042756⁴ (a number of 58 digits) contains 4444 as substring.

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, 3576460 + ... + 21346051.

It is an arithmetic number, because the mean of its divisors is an integer number (16169775630624).

Almost surely, 2^{221431426042756} is an apocalyptic number.

It is an amenable number.

221431426042756 is a deficient number, since it is larger than the sum of its proper divisors (166643189092220).

221431426042756 is a wasteful number, since it uses less digits than its factorization.

221431426042756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24925779 (or 24925777 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 49.

The spelling of 221431426042756 in words is "two hundred twenty-one trillion, four hundred thirty-one billion, four hundred twenty-six million, forty-two thousand, seven hundred fifty-six".