420415511 has 2 divisors, whose sum is σ = 420415512. Its totient is φ = 420415510.

The previous prime is 420415493. The next prime is 420415529. The reversal of 420415511 is 115514024.

It is a balanced prime because it is at equal distance from previous prime (420415493) and next prime (420415529).

It is a cyclic number.

It is not a de Polignac number, because 420415511 - 2⁶ = 420415447 is a prime.

It is a super-2 number, since 2×420415511² = 353498403778782242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420415531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210207755 + 210207756.

It is an arithmetic number, because the mean of its divisors is an integer number (210207756).

Almost surely, 2^420415511 is an apocalyptic number.

420415511 is a deficient number, since it is larger than the sum of its proper divisors (1).

420415511 is an equidigital number, since it uses as much as digits as its factorization.

420415511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 420415511 is about 20504.0364562688. The cubic root of 420415511 is about 749.1341183463.

Adding to 420415511 its reverse (115514024), we get a palindrome (535929535).

The spelling of 420415511 in words is "four hundred twenty million, four hundred fifteen thousand, five hundred eleven".