561955212 has 96 divisors (see below), whose sum is σ = 1793164800. Its totient is φ = 148205376.

The previous prime is 561955201. The next prime is 561955253. The reversal of 561955212 is 212559165.

561955212 is a `hidden beast` number, since 561 + 95 + 5 + 2 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18762 + ... + 38417.

It is an arithmetic number, because the mean of its divisors is an integer number (18678800).

Almost surely, 2^561955212 is an apocalyptic number.

561955212 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

561955212 is an abundant number, since it is smaller than the sum of its proper divisors (1231209588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561955212 is a wasteful number, since it uses less digits than its factorization.

561955212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57212 (or 57204 counting only the distinct ones).

The product of its digits is 27000, while the sum is 36.

The square root of 561955212 is about 23705.5945295620. The cubic root of 561955212 is about 825.2152297954.

The spelling of 561955212 in words is "five hundred sixty-one million, nine hundred fifty-five thousand, two hundred twelve".