87205051501 has 2 divisors, whose sum is σ = 87205051502. Its totient is φ = 87205051500.

The previous prime is 87205051481. The next prime is 87205051519. The reversal of 87205051501 is 10515050278.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57443626276 + 29761425225 = 239674^2 + 172515^2 .

It is a cyclic number.

It is not a de Polignac number, because 87205051501 - 2²⁵ = 87171497069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87205051601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43602525750 + 43602525751.

It is an arithmetic number, because the mean of its divisors is an integer number (43602525751).

Almost surely, 2^87205051501 is an apocalyptic number.

It is an amenable number.

87205051501 is a deficient number, since it is larger than the sum of its proper divisors (1).

87205051501 is an equidigital number, since it uses as much as digits as its factorization.

87205051501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14000, while the sum is 34.

The spelling of 87205051501 in words is "eighty-seven billion, two hundred five million, fifty-one thousand, five hundred one".