420213531 has 8 divisors (see below), whose sum is σ = 593242704. Its totient is φ = 263663360.

The previous prime is 420213499. The next prime is 420213533. The reversal of 420213531 is 135312024.

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 420213531 - 2⁵ = 420213499 is a prime.

It is a super-2 number, since 2×420213531² = 353158823270975922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 420213498 and 420213507.

It is not an unprimeable number, because it can be changed into a prime (420213533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4119690 + ... + 4119791.

It is an arithmetic number, because the mean of its divisors is an integer number (74155338).

Almost surely, 2^420213531 is an apocalyptic number.

420213531 is a deficient number, since it is larger than the sum of its proper divisors (173029173).

420213531 is a wasteful number, since it uses less digits than its factorization.

420213531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8239501.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 420213531 is about 20499.1104928970. The cubic root of 420213531 is about 749.0141304272.

Adding to 420213531 its reverse (135312024), we get a palindrome (555525555).

It can be divided in two parts, 42021 and 3531, that multiplied together give a triangular number (148376151 = T₁₇₂₂₆).

The spelling of 420213531 in words is "four hundred twenty million, two hundred thirteen thousand, five hundred thirty-one".