221431473367031 has 64 divisors (see below), whose sum is σ = 244473950822400. Its totient is φ = 199745974826496.

The previous prime is 221431473366989. The next prime is 221431473367061. The reversal of 221431473367031 is 130763374134122.

It is a cyclic number.

It is not a de Polignac number, because 221431473367031 - 2¹⁰ = 221431473366007 is a prime.

It is a super-2 number, since 2×221431473367031² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221431473367061) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 53654340890 + ... + 53654345016.

It is an arithmetic number, because the mean of its divisors is an integer number (3819905481600).

Almost surely, 2^{221431473367031} is an apocalyptic number.

221431473367031 is a deficient number, since it is larger than the sum of its proper divisors (23042477455369).

221431473367031 is a wasteful number, since it uses less digits than its factorization.

221431473367031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7968.

The product of its (nonzero) digits is 1524096, while the sum is 47.

The spelling of 221431473367031 in words is "two hundred twenty-one trillion, four hundred thirty-one billion, four hundred seventy-three million, three hundred sixty-seven thousand, thirty-one".