2251402469 has 4 divisors (see below), whose sum is σ = 2253661644. Its totient is φ = 2249143296.

The previous prime is 2251402459. The next prime is 2251402477. The reversal of 2251402469 is 9642041522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9642041522 = 2 ⋅4821020761.

It can be written as a sum of positive squares in 2 ways, for example, as 732351844 + 1519050625 = 27062^2 + 38975^2 .

It is a cyclic number.

It is not a de Polignac number, because 2251402469 - 2⁴ = 2251402453 is a prime.

It is a super-2 number, since 2×2251402469² = 10137626154838591922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251402459) 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, 1128092 + ... + 1130085.

It is an arithmetic number, because the mean of its divisors is an integer number (563415411).

Almost surely, 2^2251402469 is an apocalyptic number.

It is an amenable number.

2251402469 is a deficient number, since it is larger than the sum of its proper divisors (2259175).

2251402469 is an equidigital number, since it uses as much as digits as its factorization.

2251402469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2259174.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 2251402469 is about 47448.9459208527. The cubic root of 2251402469 is about 1310.6429004492.

The spelling of 2251402469 in words is "two billion, two hundred fifty-one million, four hundred two thousand, four hundred sixty-nine".