2251368451 has 4 divisors (see below), whose sum is σ = 2253189712. Its totient is φ = 2249547192.

The previous prime is 2251368439. The next prime is 2251368467. The reversal of 2251368451 is 1548631522.

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

It is a cyclic number.

It is not a de Polignac number, because 2251368451 - 2¹³ = 2251360259 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2251368451.

It is not an unprimeable number, because it can be changed into a prime (2251368401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 908775 + ... + 911248.

It is an arithmetic number, because the mean of its divisors is an integer number (563297428).

Almost surely, 2^2251368451 is an apocalyptic number.

2251368451 is a deficient number, since it is larger than the sum of its proper divisors (1821261).

2251368451 is a wasteful number, since it uses less digits than its factorization.

2251368451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1821260.

The product of its digits is 57600, while the sum is 37.

The square root of 2251368451 is about 47448.5874499969. The cubic root of 2251368451 is about 1310.6362992787.

Adding to 2251368451 its reverse (1548631522), we get a palindrome (3799999973).

The spelling of 2251368451 in words is "two billion, two hundred fifty-one million, three hundred sixty-eight thousand, four hundred fifty-one".