213126425 has 12 divisors (see below), whose sum is σ = 264475260. Its totient is φ = 170373120.

The previous prime is 213126377. The next prime is 213126427. The reversal of 213126425 is 524621312.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 55071241 + 158055184 = 7421^2 + 12572^2 .

It is not a de Polignac number, because 213126425 - 2¹⁴ = 213110041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213126394 and 213126403.

It is not an unprimeable number, because it can be changed into a prime (213126427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44969 + ... + 49481.

It is an arithmetic number, because the mean of its divisors is an integer number (22039605).

Almost surely, 2^213126425 is an apocalyptic number.

213126425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213126425 is a deficient number, since it is larger than the sum of its proper divisors (51348835).

213126425 is a wasteful number, since it uses less digits than its factorization.

213126425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6412 (or 6407 counting only the distinct ones).

The product of its digits is 2880, while the sum is 26.

The square root of 213126425 is about 14598.8501259517. The cubic root of 213126425 is about 597.3273953909.

Adding to 213126425 its reverse (524621312), we get a palindrome (737747737).

The spelling of 213126425 in words is "two hundred thirteen million, one hundred twenty-six thousand, four hundred twenty-five".