2561038215 has 64 divisors (see below), whose sum is σ = 4382415360. Its totient is φ = 1273466880.

The previous prime is 2561038211. The next prime is 2561038241. The reversal of 2561038215 is 5128301652.

2561038215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2561038215 - 2² = 2561038211 is a prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2561038211) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9049464 + ... + 9049746.

It is an arithmetic number, because the mean of its divisors is an integer number (68475240).

Almost surely, 2^2561038215 is an apocalyptic number.

2561038215 is a deficient number, since it is larger than the sum of its proper divisors (1821377145).

2561038215 is a wasteful number, since it uses less digits than its factorization.

2561038215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 2561038215 is about 50606.7012855017. The cubic root of 2561038215 is about 1368.1656617930.

Adding to 2561038215 its reverse (5128301652), we get a palindrome (7689339867).

The spelling of 2561038215 in words is "two billion, five hundred sixty-one million, thirty-eight thousand, two hundred fifteen".