2205400251 has 8 divisors (see below), whose sum is σ = 2943384400. Its totient is φ = 1468841472.

The previous prime is 2205400231. The next prime is 2205400273. The reversal of 2205400251 is 1520045022.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2205400251 - 2⁹ = 2205399739 is a prime.

It is a super-2 number, since 2×2205400251² = 9727580534221726002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2205400231) 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 7 ways as a sum of consecutive naturals, for example, 352726 + ... + 358923.

It is an arithmetic number, because the mean of its divisors is an integer number (367923050).

Almost surely, 2^2205400251 is an apocalyptic number.

2205400251 is a deficient number, since it is larger than the sum of its proper divisors (737984149).

2205400251 is a wasteful number, since it uses less digits than its factorization.

2205400251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712685.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 2205400251 is about 46961.6891838443. The cubic root of 2205400251 is about 1301.6547470486.

Adding to 2205400251 its reverse (1520045022), we get a palindrome (3725445273).

The spelling of 2205400251 in words is "two billion, two hundred five million, four hundred thousand, two hundred fifty-one".