511243401 has 4 divisors (see below), whose sum is σ = 681657872. Its totient is φ = 340828932.

The previous prime is 511243399. The next prime is 511243409. The reversal of 511243401 is 104342115.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 511243401 - 2¹ = 511243399 is a prime.

It is a super-2 number, since 2×511243401² = 522739630132093602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (511243409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85207231 + ... + 85207236.

It is an arithmetic number, because the mean of its divisors is an integer number (170414468).

Almost surely, 2^511243401 is an apocalyptic number.

It is an amenable number.

511243401 is a deficient number, since it is larger than the sum of its proper divisors (170414471).

511243401 is a wasteful number, since it uses less digits than its factorization.

511243401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170414470.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 511243401 is about 22610.6921831243. The cubic root of 511243401 is about 799.6057437553.

Adding to 511243401 its reverse (104342115), we get a palindrome (615585516).

The spelling of 511243401 in words is "five hundred eleven million, two hundred forty-three thousand, four hundred one".