511413421 has 2 divisors, whose sum is σ = 511413422. Its totient is φ = 511413420.

The previous prime is 511413361. The next prime is 511413433. The reversal of 511413421 is 124314115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 504496521 + 6916900 = 22461^2 + 2630^2 .

It is a cyclic number.

It is not a de Polignac number, because 511413421 - 2¹³ = 511405229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 511413392 and 511413401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (511410421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255706710 + 255706711.

It is an arithmetic number, because the mean of its divisors is an integer number (255706711).

Almost surely, 2^511413421 is an apocalyptic number.

It is an amenable number.

511413421 is a deficient number, since it is larger than the sum of its proper divisors (1).

511413421 is an equidigital number, since it uses as much as digits as its factorization.

511413421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 480, while the sum is 22.

The square root of 511413421 is about 22614.4515962691. The cubic root of 511413421 is about 799.6943733595.

Adding to 511413421 its reverse (124314115), we get a palindrome (635727536).

The spelling of 511413421 in words is "five hundred eleven million, four hundred thirteen thousand, four hundred twenty-one".