2621221251 has 16 divisors (see below), whose sum is σ = 3814025088. Its totient is φ = 1588060800.

The previous prime is 2621221241. The next prime is 2621221259. The reversal of 2621221251 is 1521221262.

It is not a de Polignac number, because 2621221251 - 2¹⁷ = 2621090179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2621221259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93816 + ... + 118506.

It is an arithmetic number, because the mean of its divisors is an integer number (238376568).

Almost surely, 2^2621221251 is an apocalyptic number.

2621221251 is a deficient number, since it is larger than the sum of its proper divisors (1192803837).

2621221251 is a wasteful number, since it uses less digits than its factorization.

2621221251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27922.

The product of its digits is 960, while the sum is 24.

The square root of 2621221251 is about 51197.8637347302. The cubic root of 2621221251 is about 1378.7998476537.

The spelling of 2621221251 in words is "two billion, six hundred twenty-one million, two hundred twenty-one thousand, two hundred fifty-one".