213461955 has 24 divisors (see below), whose sum is σ = 422858592. Its totient is φ = 97582464.

The previous prime is 213461951. The next prime is 213461957. The reversal of 213461955 is 559164312.

213461955 is a `hidden beast` number, since 2 + 1 + 34 + 619 + 5 + 5 = 666.

It is not a de Polignac number, because 213461955 - 2² = 213461951 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213461951) 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, 338514 + ... + 339143.

It is an arithmetic number, because the mean of its divisors is an integer number (17619108).

Almost surely, 2^213461955 is an apocalyptic number.

213461955 is a deficient number, since it is larger than the sum of its proper divisors (209396637).

213461955 is a wasteful number, since it uses less digits than its factorization.

213461955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677675 (or 677672 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 213461955 is about 14610.3372651010. The cubic root of 213461955 is about 597.6406932795.

The spelling of 213461955 in words is "two hundred thirteen million, four hundred sixty-one thousand, nine hundred fifty-five".