212769539651 has 2 divisors, whose sum is σ = 212769539652. Its totient is φ = 212769539650.

The previous prime is 212769539617. The next prime is 212769539669. The reversal of 212769539651 is 156935967212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212769539651 is a prime.

It is a super-2 number, since 2×212769539651² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212769539681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106384769825 + 106384769826.

It is an arithmetic number, because the mean of its divisors is an integer number (106384769826).

Almost surely, 2^212769539651 is an apocalyptic number.

212769539651 is a deficient number, since it is larger than the sum of its proper divisors (1).

212769539651 is an equidigital number, since it uses as much as digits as its factorization.

212769539651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6123600, while the sum is 56.

The spelling of 212769539651 in words is "two hundred twelve billion, seven hundred sixty-nine million, five hundred thirty-nine thousand, six hundred fifty-one".