2251461965 has 4 divisors (see below), whose sum is σ = 2701754364. Its totient is φ = 1801169568.

The previous prime is 2251461959. The next prime is 2251462013. The reversal of 2251461965 is 5691641522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 895086724 + 1356375241 = 29918^2 + 36829^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2251461965 is a prime.

It is a super-2 number, since 2×2251461965² = 10138161959683322450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225146192 + ... + 225146201.

It is an arithmetic number, because the mean of its divisors is an integer number (675438591).

Almost surely, 2^2251461965 is an apocalyptic number.

It is an amenable number.

2251461965 is a deficient number, since it is larger than the sum of its proper divisors (450292399).

2251461965 is an equidigital number, since it uses as much as digits as its factorization.

2251461965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450292398.

The product of its digits is 129600, while the sum is 41.

The square root of 2251461965 is about 47449.5728642524. The cubic root of 2251461965 is about 1310.6544454490.

The spelling of 2251461965 in words is "two billion, two hundred fifty-one million, four hundred sixty-one thousand, nine hundred sixty-five".