2251503581 has 2 divisors, whose sum is σ = 2251503582. Its totient is φ = 2251503580.

The previous prime is 2251503571. The next prime is 2251503593. The reversal of 2251503581 is 1853051522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1563490681 + 688012900 = 39541^2 + 26230^2 .

It is a cyclic number.

It is not a de Polignac number, because 2251503581 - 2⁶ = 2251503517 is a prime.

It is a super-2 number, since 2×2251503581² = 10138536750511647122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2251503571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1125751790 + 1125751791.

It is an arithmetic number, because the mean of its divisors is an integer number (1125751791).

Almost surely, 2^2251503581 is an apocalyptic number.

It is an amenable number.

2251503581 is a deficient number, since it is larger than the sum of its proper divisors (1).

2251503581 is an equidigital number, since it uses as much as digits as its factorization.

2251503581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 2251503581 is about 47450.0113909365. The cubic root of 2251503581 is about 1310.6625207737.

The spelling of 2251503581 in words is "two billion, two hundred fifty-one million, five hundred three thousand, five hundred eighty-one".