2151223432 has 32 divisors (see below), whose sum is σ = 4077000000. Its totient is φ = 1064086848.

The previous prime is 2151223429. The next prime is 2151223439. The reversal of 2151223432 is 2343221512.

It is a junction number, because it is equal to n+sod(n) for n = 2151223397 and 2151223406.

It is not an unprimeable number, because it can be changed into a prime (2151223439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281194 + ... + 288742.

It is an arithmetic number, because the mean of its divisors is an integer number (127406250).

Almost surely, 2^2151223432 is an apocalyptic number.

It is an amenable number.

2151223432 is a deficient number, since it is larger than the sum of its proper divisors (1925776568).

2151223432 is a wasteful number, since it uses less digits than its factorization.

2151223432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7933 (or 7929 counting only the distinct ones).

The product of its digits is 2880, while the sum is 25.

The square root of 2151223432 is about 46381.2832077768. The cubic root of 2151223432 is about 1290.9076463877.

Adding to 2151223432 its reverse (2343221512), we get a palindrome (4494444944).

It can be divided in two parts, 21512 and 23432, that added together give a palindrome (44944).

The spelling of 2151223432 in words is "two billion, one hundred fifty-one million, two hundred twenty-three thousand, four hundred thirty-two".