145462135221 has 24 divisors (see below), whose sum is σ = 230109603360. Its totient is φ = 87997949856.

The previous prime is 145462135219. The next prime is 145462135223. The reversal of 145462135221 is 122531264541.

145462135221 is a `hidden beast` number, since 1 + 4 + 5 + 4 + 621 + 3 + 5 + 2 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (145462135219) and next prime (145462135223).

It is not a de Polignac number, because 145462135221 - 2¹ = 145462135219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145462135223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10529251 + ... + 10543056.

It is an arithmetic number, because the mean of its divisors is an integer number (9587900140).

Almost surely, 2^145462135221 is an apocalyptic number.

It is an amenable number.

145462135221 is a deficient number, since it is larger than the sum of its proper divisors (84647468139).

145462135221 is a wasteful number, since it uses less digits than its factorization.

145462135221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21072385 (or 21072382 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

Adding to 145462135221 its reverse (122531264541), we get a palindrome (267993399762).

The spelling of 145462135221 in words is "one hundred forty-five billion, four hundred sixty-two million, one hundred thirty-five thousand, two hundred twenty-one".