213125051 has 4 divisors (see below), whose sum is σ = 216737400. Its totient is φ = 209512704.

The previous prime is 213125047. The next prime is 213125053. The reversal of 213125051 is 150521312.

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 213125051 - 2² = 213125047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213125053) 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, 1806086 + ... + 1806203.

It is an arithmetic number, because the mean of its divisors is an integer number (54184350).

Almost surely, 2^213125051 is an apocalyptic number.

213125051 is a deficient number, since it is larger than the sum of its proper divisors (3612349).

213125051 is an equidigital number, since it uses as much as digits as its factorization.

213125051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3612348.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 213125051 is about 14598.8030673751. The cubic root of 213125051 is about 597.3261117559.

Adding to 213125051 its reverse (150521312), we get a palindrome (363646363).

The spelling of 213125051 in words is "two hundred thirteen million, one hundred twenty-five thousand, fifty-one".