153234421 has 2 divisors, whose sum is σ = 153234422. Its totient is φ = 153234420.

The previous prime is 153234391. The next prime is 153234443. The reversal of 153234421 is 124432351.

153234421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152399025 + 835396 = 12345^2 + 914^2 .

It is an emirp because it is prime and its reverse (124432351) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 153234421 - 2²¹ = 151137269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (153234721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76617210 + 76617211.

It is an arithmetic number, because the mean of its divisors is an integer number (76617211).

Almost surely, 2^153234421 is an apocalyptic number.

It is an amenable number.

153234421 is a deficient number, since it is larger than the sum of its proper divisors (1).

153234421 is an equidigital number, since it uses as much as digits as its factorization.

153234421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 25.

The square root of 153234421 is about 12378.7891572641. The cubic root of 153234421 is about 535.1211429748.

Adding to 153234421 its reverse (124432351), we get a palindrome (277666772).

It can be divided in two parts, 1532 and 34421, that added together give a palindrome (35953).

The spelling of 153234421 in words is "one hundred fifty-three million, two hundred thirty-four thousand, four hundred twenty-one".