2251540636 has 6 divisors (see below), whose sum is σ = 3940196120. Its totient is φ = 1125770316.

The previous prime is 2251540609. The next prime is 2251540637. The reversal of 2251540636 is 6360451522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251540637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 281442576 + ... + 281442583.

Almost surely, 2^2251540636 is an apocalyptic number.

It is an amenable number.

2251540636 is a deficient number, since it is larger than the sum of its proper divisors (1688655484).

2251540636 is a wasteful number, since it uses less digits than its factorization.

2251540636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562885163 (or 562885161 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 2251540636 is about 47450.4018528821. The cubic root of 2251540636 is about 1310.6697109812.

The spelling of 2251540636 in words is "two billion, two hundred fifty-one million, five hundred forty thousand, six hundred thirty-six".