221145923933 has 16 divisors (see below), whose sum is σ = 255284877312. Its totient is φ = 189592326000.

The previous prime is 221145923927. The next prime is 221145923939. The reversal of 221145923933 is 339329541122.

It is an interprime number because it is at equal distance from previous prime (221145923927) and next prime (221145923939).

It is not a de Polignac number, because 221145923933 - 2⁴ = 221145923917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221145923939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6137633 + ... + 6173558.

It is an arithmetic number, because the mean of its divisors is an integer number (15955304832).

Almost surely, 2^221145923933 is an apocalyptic number.

221145923933 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

221145923933 is a deficient number, since it is larger than the sum of its proper divisors (34138953379).

221145923933 is a wasteful number, since it uses less digits than its factorization.

221145923933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12311296.

The product of its digits is 349920, while the sum is 44.

The spelling of 221145923933 in words is "two hundred twenty-one billion, one hundred forty-five million, nine hundred twenty-three thousand, nine hundred thirty-three".