2045020251 has 16 divisors (see below), whose sum is σ = 2758006944. Its totient is φ = 1347723264.

The previous prime is 2045020249. The next prime is 2045020261. The reversal of 2045020251 is 1520205402.

It is a happy number.

It is not a de Polignac number, because 2045020251 - 2¹ = 2045020249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2045020261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 280711 + ... + 287903.

It is an arithmetic number, because the mean of its divisors is an integer number (172375434).

Almost surely, 2^2045020251 is an apocalyptic number.

2045020251 is a deficient number, since it is larger than the sum of its proper divisors (712986693).

2045020251 is an equidigital number, since it uses as much as digits as its factorization.

2045020251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8270.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 2045020251 is about 45221.9001259346. The cubic root of 2045020251 is about 1269.3046498349.

Adding to 2045020251 its reverse (1520205402), we get a palindrome (3565225653).

The spelling of 2045020251 in words is "two billion, forty-five million, twenty thousand, two hundred fifty-one".