42511215365 has 4 divisors (see below), whose sum is σ = 51013458444. Its totient is φ = 34008972288.

The previous prime is 42511215323. The next prime is 42511215377. The reversal of 42511215365 is 56351211524.

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 31985891716 + 10525323649 = 178846^2 + 102593^2 .

It is a cyclic number.

It is not a de Polignac number, because 42511215365 - 2⁶ = 42511215301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4251121532 + ... + 4251121541.

It is an arithmetic number, because the mean of its divisors is an integer number (12753364611).

Almost surely, 2^42511215365 is an apocalyptic number.

It is an amenable number.

42511215365 is a deficient number, since it is larger than the sum of its proper divisors (8502243079).

42511215365 is an equidigital number, since it uses as much as digits as its factorization.

42511215365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8502243078.

The product of its digits is 36000, while the sum is 35.

Adding to 42511215365 its reverse (56351211524), we get a palindrome (98862426889).

The spelling of 42511215365 in words is "forty-two billion, five hundred eleven million, two hundred fifteen thousand, three hundred sixty-five".