2520261601 has 16 divisors (see below), whose sum is σ = 2964044160. Its totient is φ = 2112635520.

The previous prime is 2520261553. The next prime is 2520261619. The reversal of 2520261601 is 1061620252.

It is a cyclic number.

It is not a de Polignac number, because 2520261601 - 2¹⁵ = 2520228833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2520261001) 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, 131605 + ... + 149533.

It is an arithmetic number, because the mean of its divisors is an integer number (185252760).

Almost surely, 2^2520261601 is an apocalyptic number.

It is an amenable number.

2520261601 is a deficient number, since it is larger than the sum of its proper divisors (443782559).

2520261601 is a wasteful number, since it uses less digits than its factorization.

2520261601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18936.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 2520261601 is about 50202.2071327546. The cubic root of 2520261601 is about 1360.8655103788.

Adding to 2520261601 its reverse (1061620252), we get a palindrome (3581881853).

The spelling of 2520261601 in words is "two billion, five hundred twenty million, two hundred sixty-one thousand, six hundred one".