2261490651 has 64 divisors (see below), whose sum is σ = 3916431360. Its totient is φ = 1263094560.

The previous prime is 2261490631. The next prime is 2261490659. The reversal of 2261490651 is 1560941622.

It is not a de Polignac number, because 2261490651 - 2⁹ = 2261490139 is a prime.

It is a super-2 number, since 2×2261490651² = 10228679929120807602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2261490659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1703550 + ... + 1704876.

It is an arithmetic number, because the mean of its divisors is an integer number (61194240).

Almost surely, 2^2261490651 is an apocalyptic number.

2261490651 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2261490651 is a deficient number, since it is larger than the sum of its proper divisors (1654940709).

2261490651 is a wasteful number, since it uses less digits than its factorization.

2261490651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1541 (or 1535 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 2261490651 is about 47555.1327513655. The cubic root of 2261490651 is about 1312.5975790309.

The spelling of 2261490651 in words is "two billion, two hundred sixty-one million, four hundred ninety thousand, six hundred fifty-one".