2615213100261 has 4 divisors (see below), whose sum is σ = 3486950800352. Its totient is φ = 1743475400172.

The previous prime is 2615213100251. The next prime is 2615213100271. The reversal of 2615213100261 is 1620013125162.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2615213100251) and next prime (2615213100271).

It is not a de Polignac number, because 2615213100261 - 2¹¹ = 2615213098213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2615213100221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 435868850041 + ... + 435868850046.

It is an arithmetic number, because the mean of its divisors is an integer number (871737700088).

Almost surely, 2^{2615213100261} is an apocalyptic number.

It is an amenable number.

2615213100261 is a deficient number, since it is larger than the sum of its proper divisors (871737700091).

2615213100261 is an equidigital number, since it uses as much as digits as its factorization.

2615213100261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871737700090.

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 2615213100261 in words is "two trillion, six hundred fifteen billion, two hundred thirteen million, one hundred thousand, two hundred sixty-one".