211201655497 has 32 divisors (see below), whose sum is σ = 245702096640. Its totient is φ = 177811476480.

The previous prime is 211201655477. The next prime is 211201655507. The reversal of 211201655497 is 794556102112.

It is a cyclic number.

It is not a de Polignac number, because 211201655497 - 2¹⁵ = 211201622729 is a prime.

It is a super-2 number, since 2×211201655497² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211201655407) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141840529 + ... + 141842017.

It is an arithmetic number, because the mean of its divisors is an integer number (7678190520).

Almost surely, 2^211201655497 is an apocalyptic number.

It is an amenable number.

211201655497 is a deficient number, since it is larger than the sum of its proper divisors (34500441143).

211201655497 is a wasteful number, since it uses less digits than its factorization.

211201655497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2833.

The product of its (nonzero) digits is 151200, while the sum is 43.

The spelling of 211201655497 in words is "two hundred eleven billion, two hundred one million, six hundred fifty-five thousand, four hundred ninety-seven".