212561051 has 4 divisors (see below), whose sum is σ = 215733672. Its totient is φ = 209388432.

The previous prime is 212561033. The next prime is 212561053. The reversal of 212561051 is 150165212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212561051 - 2¹⁴ = 212544667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212561053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1586210 + ... + 1586343.

It is an arithmetic number, because the mean of its divisors is an integer number (53933418).

Almost surely, 2^212561051 is an apocalyptic number.

212561051 is a deficient number, since it is larger than the sum of its proper divisors (3172621).

212561051 is an equidigital number, since it uses as much as digits as its factorization.

212561051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3172620.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 212561051 is about 14579.4736187559. The cubic root of 212561051 is about 596.7987382112.

The spelling of 212561051 in words is "two hundred twelve million, five hundred sixty-one thousand, fifty-one".