221042514431431 has 16 divisors (see below), whose sum is σ = 282307069433088. Its totient is φ = 168039922276800.

The previous prime is 221042514431381. The next prime is 221042514431461. The reversal of 221042514431431 is 134134415240122.

It is not a de Polignac number, because 221042514431431 - 2⁹ = 221042514430919 is a prime.

It is a super-2 number, since 2×221042514431431² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221042514431461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35008313985 + ... + 35008320298.

It is an arithmetic number, because the mean of its divisors is an integer number (17644191839568).

Almost surely, 2^{221042514431431} is an apocalyptic number.

221042514431431 is a deficient number, since it is larger than the sum of its proper divisors (61264555001657).

221042514431431 is a wasteful number, since it uses less digits than its factorization.

221042514431431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70016634342.

The product of its (nonzero) digits is 92160, while the sum is 37.

Adding to 221042514431431 its reverse (134134415240122), we get a palindrome (355176929671553).

The spelling of 221042514431431 in words is "two hundred twenty-one trillion, forty-two billion, five hundred fourteen million, four hundred thirty-one thousand, four hundred thirty-one".