2051621252 has 48 divisors (see below), whose sum is σ = 3837335040. Its totient is φ = 957530112.

The previous prime is 2051621249. The next prime is 2051621281. The reversal of 2051621252 is 2521261502.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2667524 + ... + 2668292.

It is an arithmetic number, because the mean of its divisors is an integer number (79944480).

Almost surely, 2^2051621252 is an apocalyptic number.

It is an amenable number.

2051621252 is a deficient number, since it is larger than the sum of its proper divisors (1785713788).

2051621252 is a wasteful number, since it uses less digits than its factorization.

2051621252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1460 (or 1458 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 2051621252 is about 45294.8258855247. The cubic root of 2051621252 is about 1270.6688877313.

Adding to 2051621252 its reverse (2521261502), we get a palindrome (4572882754).

The spelling of 2051621252 in words is "two billion, fifty-one million, six hundred twenty-one thousand, two hundred fifty-two".