1211852655 has 24 divisors (see below), whose sum is σ = 2262126048. Its totient is φ = 596604096.

The previous prime is 1211852627. The next prime is 1211852659. The reversal of 1211852655 is 5562581121.

1211852655 is a `hidden beast` number, since 12 + 118 + 526 + 5 + 5 = 666.

It is not a de Polignac number, because 1211852655 - 2⁶ = 1211852591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211852659) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1035187 + ... + 1036356.

It is an arithmetic number, because the mean of its divisors is an integer number (94255252).

Almost surely, 2^1211852655 is an apocalyptic number.

1211852655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1211852655 is a deficient number, since it is larger than the sum of its proper divisors (1050273393).

1211852655 is a wasteful number, since it uses less digits than its factorization.

1211852655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2071567 (or 2071564 counting only the distinct ones).

The product of its digits is 24000, while the sum is 36.

The square root of 1211852655 is about 34811.6741194675. The cubic root of 1211852655 is about 1066.1458143403.

The spelling of 1211852655 in words is "one billion, two hundred eleven million, eight hundred fifty-two thousand, six hundred fifty-five".