82961551 has 2 divisors, whose sum is σ = 82961552. Its totient is φ = 82961550.

The previous prime is 82961539. The next prime is 82961579. The reversal of 82961551 is 15516928.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82961551 - 2¹⁹ = 82437263 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82961551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82961591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41480775 + 41480776.

It is an arithmetic number, because the mean of its divisors is an integer number (41480776).

Almost surely, 2^82961551 is an apocalyptic number.

82961551 is a deficient number, since it is larger than the sum of its proper divisors (1).

82961551 is an equidigital number, since it uses as much as digits as its factorization.

82961551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 37.

The square root of 82961551 is about 9108.3231716930. The cubic root of 82961551 is about 436.1397004147.

The spelling of 82961551 in words is "eighty-two million, nine hundred sixty-one thousand, five hundred fifty-one".