420251213 has 4 divisors (see below), whose sum is σ = 420613728. Its totient is φ = 419888700.

The previous prime is 420251207. The next prime is 420251231. The reversal of 420251213 is 312152024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 420251213 - 2¹⁶ = 420185677 is a prime.

It is a super-2 number, since 2×420251213² = 353222164055942738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420251233) 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, 179513 + ... + 181838.

It is an arithmetic number, because the mean of its divisors is an integer number (105153432).

Almost surely, 2^420251213 is an apocalyptic number.

It is an amenable number.

420251213 is a deficient number, since it is larger than the sum of its proper divisors (362515).

420251213 is a wasteful number, since it uses less digits than its factorization.

420251213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362514.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 420251213 is about 20500.0295853445. The cubic root of 420251213 is about 749.0365186535.

The spelling of 420251213 in words is "four hundred twenty million, two hundred fifty-one thousand, two hundred thirteen".