32158221916 has 36 divisors (see below), whose sum is σ = 59706213840. Its totient is φ = 15145943680.

The previous prime is 32158221911. The next prime is 32158221929. The reversal of 32158221916 is 61912285123.

It is a happy number.

It is a super-2 number, since 2×32158221916² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32158221911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21345 + ... + 254503.

It is an arithmetic number, because the mean of its divisors is an integer number (1658505940).

Almost surely, 2^32158221916 is an apocalyptic number.

It is an amenable number.

32158221916 is a deficient number, since it is larger than the sum of its proper divisors (27547991924).

32158221916 is a wasteful number, since it uses less digits than its factorization.

32158221916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233262 (or 233231 counting only the distinct ones).

The product of its digits is 51840, while the sum is 40.

The spelling of 32158221916 in words is "thirty-two billion, one hundred fifty-eight million, two hundred twenty-one thousand, nine hundred sixteen".