81962051 has 2 divisors, whose sum is σ = 81962052. Its totient is φ = 81962050.

The previous prime is 81962039. The next prime is 81962057. The reversal of 81962051 is 15026918.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81962051 - 2⁶ = 81961987 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 81961999 and 81962017.

It is not a weakly prime, because it can be changed into another prime (81962057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40981025 + 40981026.

It is an arithmetic number, because the mean of its divisors is an integer number (40981026).

Almost surely, 2^81962051 is an apocalyptic number.

81962051 is a deficient number, since it is larger than the sum of its proper divisors (1).

81962051 is an equidigital number, since it uses as much as digits as its factorization.

81962051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 81962051 is about 9053.2895126578. The cubic root of 81962051 is about 434.3811184274.

Adding to 81962051 its reverse (15026918), we get a palindrome (96988969).

The spelling of 81962051 in words is "eighty-one million, nine hundred sixty-two thousand, fifty-one".