420531340551 has 16 divisors (see below), whose sum is σ = 641092402944. Its totient is φ = 240197595264.

The previous prime is 420531340549. The next prime is 420531340553. The reversal of 420531340551 is 155043135024.

It is an interprime number because it is at equal distance from previous prime (420531340549) and next prime (420531340553).

It is not a de Polignac number, because 420531340551 - 2¹ = 420531340549 is a prime.

It is a super-2 number, since 2×420531340551² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420531340553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4369090 + ... + 4464303.

It is an arithmetic number, because the mean of its divisors is an integer number (40068275184).

Almost surely, 2^420531340551 is an apocalyptic number.

420531340551 is a deficient number, since it is larger than the sum of its proper divisors (220561062393).

420531340551 is a wasteful number, since it uses less digits than its factorization.

420531340551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8835670.

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 420531340551 its reverse (155043135024), we get a palindrome (575574475575).

The spelling of 420531340551 in words is "four hundred twenty billion, five hundred thirty-one million, three hundred forty thousand, five hundred fifty-one".