82620513 has 16 divisors (see below), whose sum is σ = 122853760. Its totient is φ = 54876528.

The previous prime is 82620511. The next prime is 82620529. The reversal of 82620513 is 31502628.

It is not a de Polignac number, because 82620513 - 2¹ = 82620511 is a prime.

It is a super-2 number, since 2×82620513² = 13652298336766338, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82620511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1956 + ... + 13002.

It is an arithmetic number, because the mean of its divisors is an integer number (7678360).

Almost surely, 2^82620513 is an apocalyptic number.

It is an amenable number.

82620513 is a deficient number, since it is larger than the sum of its proper divisors (40233247).

82620513 is a wasteful number, since it uses less digits than its factorization.

82620513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11333 (or 11327 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 82620513 is about 9089.5826636870. The cubic root of 82620513 is about 435.5412525407.

The spelling of 82620513 in words is "eighty-two million, six hundred twenty thousand, five hundred thirteen".