2291561415 has 192 divisors, whose sum is σ = 5034286080. Its totient is φ = 978531840.

The previous prime is 2291561413. The next prime is 2291561449. The reversal of 2291561415 is 5141651922.

2291561415 is a `hidden beast` number, since 2 + 2 + 91 + 561 + 4 + 1 + 5 = 666.

2291561415 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2291561415 - 2¹ = 2291561413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2291561415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2291561413) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 5771997 + ... + 5772393.

It is an arithmetic number, because the mean of its divisors is an integer number (26220240).

Almost surely, 2^2291561415 is an apocalyptic number.

2291561415 is an abundant number, since it is smaller than the sum of its proper divisors (2742724665).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2291561415 is a wasteful number, since it uses less digits than its factorization.

2291561415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471 (or 452 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 2291561415 is about 47870.2560573891. The cubic root of 2291561415 is about 1318.3897979573.

The spelling of 2291561415 in words is "two billion, two hundred ninety-one million, five hundred sixty-one thousand, four hundred fifteen".