420213551 has 8 divisors (see below), whose sum is σ = 442098384. Its totient is φ = 398882880.

The previous prime is 420213539. The next prime is 420213569. The reversal of 420213551 is 155312024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 420213551 - 2⁶ = 420213487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420213581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136985 + ... + 140018.

It is an arithmetic number, because the mean of its divisors is an integer number (55262298).

Almost surely, 2^420213551 is an apocalyptic number.

420213551 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

420213551 is a deficient number, since it is larger than the sum of its proper divisors (21884833).

420213551 is a wasteful number, since it uses less digits than its factorization.

420213551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277081.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 420213551 is about 20499.1109807230. The cubic root of 420213551 is about 749.0141423103.

Adding to 420213551 its reverse (155312024), we get a palindrome (575525575).

The spelling of 420213551 in words is "four hundred twenty million, two hundred thirteen thousand, five hundred fifty-one".