2651551221 has 32 divisors (see below), whose sum is σ = 3960907776. Its totient is φ = 1563824000.

The previous prime is 2651551211. The next prime is 2651551223. The reversal of 2651551221 is 1221551562.

It is a cyclic number.

It is not a de Polignac number, because 2651551221 - 2⁶ = 2651551157 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2651551223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 580870 + ... + 585416.

It is an arithmetic number, because the mean of its divisors is an integer number (123778368).

Almost surely, 2^2651551221 is an apocalyptic number.

It is an amenable number.

2651551221 is a deficient number, since it is larger than the sum of its proper divisors (1309356555).

2651551221 is a wasteful number, since it uses less digits than its factorization.

2651551221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5033.

The product of its digits is 6000, while the sum is 30.

The square root of 2651551221 is about 51493.2152909488. The cubic root of 2651551221 is about 1384.0974663572.

The spelling of 2651551221 in words is "two billion, six hundred fifty-one million, five hundred fifty-one thousand, two hundred twenty-one".