221426510019 has 32 divisors (see below), whose sum is σ = 346968969984. Its totient is φ = 123832452480.

The previous prime is 221426509973. The next prime is 221426510021. The reversal of 221426510019 is 910015624122.

It is not a de Polignac number, because 221426510019 - 2¹³ = 221426501827 is a prime.

It is a super-2 number, since 2×221426510019² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (221426510219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1184029 + ... + 1358225.

It is an arithmetic number, because the mean of its divisors is an integer number (10842780312).

Almost surely, 2^221426510019 is an apocalyptic number.

221426510019 is a deficient number, since it is larger than the sum of its proper divisors (125542459965).

221426510019 is a wasteful number, since it uses less digits than its factorization.

221426510019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177187.

The product of its (nonzero) digits is 8640, while the sum is 33.

It can be divided in two parts, 221426 and 510019, that added together give a triangular number (731445 = T₁₂₀₉).

The spelling of 221426510019 in words is "two hundred twenty-one billion, four hundred twenty-six million, five hundred ten thousand, nineteen".