2261601511 has 32 divisors (see below), whose sum is σ = 2713435200. Its totient is φ = 1864611840.

The previous prime is 2261601509. The next prime is 2261601571. The reversal of 2261601511 is 1151061622.

It is a happy number.

It is not a de Polignac number, because 2261601511 - 2¹ = 2261601509 is a prime.

It is a super-2 number, since 2×2261601511² = 10229682789114966242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2261601571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 375141 + ... + 381121.

It is an arithmetic number, because the mean of its divisors is an integer number (84794850).

Almost surely, 2^2261601511 is an apocalyptic number.

2261601511 is a deficient number, since it is larger than the sum of its proper divisors (451833689).

2261601511 is a wasteful number, since it uses less digits than its factorization.

2261601511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6099.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 2261601511 is about 47556.2983315565. The cubic root of 2261601511 is about 1312.6190268593.

The spelling of 2261601511 in words is "two billion, two hundred sixty-one million, six hundred one thousand, five hundred eleven".