87205051541 has 4 divisors (see below), whose sum is σ = 87205819692. Its totient is φ = 87204283392.

The previous prime is 87205051537. The next prime is 87205051559. The reversal of 87205051541 is 14515050278.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 14515050278 = 2 ⋅7257525139.

It can be written as a sum of positive squares in 2 ways, for example, as 16051623025 + 71153428516 = 126695^2 + 266746^2 .

It is a cyclic number.

It is not a de Polignac number, because 87205051541 - 2² = 87205051537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87205051495 and 87205051504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87205051501) 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, 176330 + ... + 453323.

It is an arithmetic number, because the mean of its divisors is an integer number (21801454923).

Almost surely, 2^87205051541 is an apocalyptic number.

It is an amenable number.

87205051541 is a deficient number, since it is larger than the sum of its proper divisors (768151).

87205051541 is a wasteful number, since it uses less digits than its factorization.

87205051541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768150.

The product of its (nonzero) digits is 56000, while the sum is 38.

The spelling of 87205051541 in words is "eighty-seven billion, two hundred five million, fifty-one thousand, five hundred forty-one".