2151521224 has 32 divisors (see below), whose sum is σ = 4305070080. Its totient is φ = 1004500224.

The previous prime is 2151521191. The next prime is 2151521237. The reversal of 2151521224 is 4221251512.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45012 + ... + 79555.

It is an arithmetic number, because the mean of its divisors is an integer number (134533440).

Almost surely, 2^2151521224 is an apocalyptic number.

It is an amenable number.

2151521224 is an abundant number, since it is smaller than the sum of its proper divisors (2153548856).

2151521224 is a wasteful number, since it uses less digits than its factorization.

2151521224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124717 (or 124713 counting only the distinct ones).

The product of its digits is 1600, while the sum is 25.

The square root of 2151521224 is about 46384.4933571555. The cubic root of 2151521224 is about 1290.9672100492.

Adding to 2151521224 its reverse (4221251512), we get a palindrome (6372772736).

The spelling of 2151521224 in words is "two billion, one hundred fifty-one million, five hundred twenty-one thousand, two hundred twenty-four".