2534520221465 has 4 divisors (see below), whose sum is σ = 3041424265764. Its totient is φ = 2027616177168.

The previous prime is 2534520221461. The next prime is 2534520221507. The reversal of 2534520221465 is 5641220254352.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1225756765321 + 1308763456144 = 1107139^2 + 1144012^2 .

It is a cyclic number.

It is not a de Polignac number, because 2534520221465 - 2² = 2534520221461 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2534520221461) 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, 253452022142 + ... + 253452022151.

It is an arithmetic number, because the mean of its divisors is an integer number (760356066441).

Almost surely, 2^{2534520221465} is an apocalyptic number.

It is an amenable number.

2534520221465 is a deficient number, since it is larger than the sum of its proper divisors (506904044299).

2534520221465 is an equidigital number, since it uses as much as digits as its factorization.

2534520221465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506904044298.

The product of its (nonzero) digits is 576000, while the sum is 41.

The spelling of 2534520221465 in words is "two trillion, five hundred thirty-four billion, five hundred twenty million, two hundred twenty-one thousand, four hundred sixty-five".