505153421 has 2 divisors, whose sum is σ = 505153422. Its totient is φ = 505153420.

The previous prime is 505153381. The next prime is 505153447. The reversal of 505153421 is 124351505.

It is an a-pointer prime, because the next prime (505153447) can be obtained adding 505153421 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 297390025 + 207763396 = 17245^2 + 14414^2 .

It is a cyclic number.

It is not a de Polignac number, because 505153421 - 2¹⁴ = 505137037 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505153471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252576710 + 252576711.

It is an arithmetic number, because the mean of its divisors is an integer number (252576711).

Almost surely, 2^505153421 is an apocalyptic number.

It is an amenable number.

505153421 is a deficient number, since it is larger than the sum of its proper divisors (1).

505153421 is an equidigital number, since it uses as much as digits as its factorization.

505153421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 505153421 is about 22475.6183674666. The cubic root of 505153421 is about 796.4180595015.

The spelling of 505153421 in words is "five hundred five million, one hundred fifty-three thousand, four hundred twenty-one".