511045440421 has 8 divisors (see below), whose sum is σ = 521939157120. Its totient is φ = 500152574208.

The previous prime is 511045440403. The next prime is 511045440461. The reversal of 511045440421 is 124044540115.

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 511045440421 - 2⁷ = 511045440293 is a prime.

It is a super-2 number, since 2×511045440421² (a number of 24 digits) 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 (511045440461) 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, 1085530 + ... + 1483396.

It is an arithmetic number, because the mean of its divisors is an integer number (65242394640).

Almost surely, 2^511045440421 is an apocalyptic number.

It is an amenable number.

511045440421 is a deficient number, since it is larger than the sum of its proper divisors (10893716699).

511045440421 is a wasteful number, since it uses less digits than its factorization.

511045440421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425243.

The product of its (nonzero) digits is 12800, while the sum is 31.

Adding to 511045440421 its reverse (124044540115), we get a palindrome (635089980536).

The spelling of 511045440421 in words is "five hundred eleven billion, forty-five million, four hundred forty thousand, four hundred twenty-one".