2251985537 has 2 divisors, whose sum is σ = 2251985538. Its totient is φ = 2251985536.

The previous prime is 2251985531. The next prime is 2251985569. The reversal of 2251985537 is 7355891522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1380791281 + 871194256 = 37159^2 + 29516^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2251985537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2251985491 and 2251985500.

It is not a weakly prime, because it can be changed into another prime (2251985531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1125992768 + 1125992769.

It is an arithmetic number, because the mean of its divisors is an integer number (1125992769).

Almost surely, 2^2251985537 is an apocalyptic number.

It is an amenable number.

2251985537 is a deficient number, since it is larger than the sum of its proper divisors (1).

2251985537 is an equidigital number, since it uses as much as digits as its factorization.

2251985537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756000, while the sum is 47.

The square root of 2251985537 is about 47455.0896848800. The cubic root of 2251985537 is about 1310.7560340751.

It can be divided in two parts, 2251985 and 537, that added together give a palindrome (2252522).

The spelling of 2251985537 in words is "two billion, two hundred fifty-one million, nine hundred eighty-five thousand, five hundred thirty-seven".