82701561 has 4 divisors (see below), whose sum is σ = 110268752. Its totient is φ = 55134372.

The previous prime is 82701503. The next prime is 82701569. The reversal of 82701561 is 16510728.

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 not a de Polignac number, because 82701561 - 2¹⁰ = 82700537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82701569) 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, 13783591 + ... + 13783596.

It is an arithmetic number, because the mean of its divisors is an integer number (27567188).

Almost surely, 2^82701561 is an apocalyptic number.

It is an amenable number.

82701561 is a deficient number, since it is larger than the sum of its proper divisors (27567191).

82701561 is a wasteful number, since it uses less digits than its factorization.

82701561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27567190.

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 82701561 is about 9094.0398613597. The cubic root of 82701561 is about 435.6836232015.

The spelling of 82701561 in words is "eighty-two million, seven hundred one thousand, five hundred sixty-one".