211534734897 has 10 divisors (see below), whose sum is σ = 315996332498. Its totient is φ = 141023156544.

The previous prime is 211534734893. The next prime is 211534734941. The reversal of 211534734897 is 798437435112.

211534734897 is a `hidden beast` number, since 2 + 1 + 153 + 4 + 7 + 3 + 489 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 139260326976 + 72274407921 = 373176^2 + 268839^2 .

It is not a de Polignac number, because 211534734897 - 2² = 211534734893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211534734893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1305769888 + ... + 1305770049.

Almost surely, 2^211534734897 is an apocalyptic number.

211534734897 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

211534734897 is a deficient number, since it is larger than the sum of its proper divisors (104461597601).

211534734897 is an equidigital number, since it uses as much as digits as its factorization.

211534734897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2611539949 (or 2611539940 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

The spelling of 211534734897 in words is "two hundred eleven billion, five hundred thirty-four million, seven hundred thirty-four thousand, eight hundred ninety-seven".