2151321450 has 24 divisors (see below), whose sum is σ = 5335277568. Its totient is φ = 573685680.

The previous prime is 2151321437. The next prime is 2151321479. The reversal of 2151321450 is 541231512.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2151321450.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7170922 + ... + 7171221.

It is an arithmetic number, because the mean of its divisors is an integer number (222303232).

Almost surely, 2^2151321450 is an apocalyptic number.

2151321450 is an abundant number, since it is smaller than the sum of its proper divisors (3183956118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2151321450 is a wasteful number, since it uses less digits than its factorization.

2151321450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14342158 (or 14342153 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 2151321450 is about 46382.3398504215. The cubic root of 2151321450 is about 1290.9272523264.

Adding to 2151321450 its reverse (541231512), we get a palindrome (2692552962).

The spelling of 2151321450 in words is "two billion, one hundred fifty-one million, three hundred twenty-one thousand, four hundred fifty".