145521225033431 has 4 divisors (see below), whose sum is σ = 156715165420632. Its totient is φ = 134327284646232.

The previous prime is 145521225033407. The next prime is 145521225033469. The reversal of 145521225033431 is 134330522125541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145521225033431 - 2⁶ = 145521225033367 is a prime.

It is a super-2 number, since 2×145521225033431² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145521225333431) 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, 5596970193581 + ... + 5596970193606.

It is an arithmetic number, because the mean of its divisors is an integer number (39178791355158).

Almost surely, 2^{145521225033431} is an apocalyptic number.

145521225033431 is a deficient number, since it is larger than the sum of its proper divisors (11193940387201).

145521225033431 is a wasteful number, since it uses less digits than its factorization.

145521225033431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11193940387200.

The product of its (nonzero) digits is 432000, while the sum is 41.

Adding to 145521225033431 its reverse (134330522125541), we get a palindrome (279851747158972).

The spelling of 145521225033431 in words is "one hundred forty-five trillion, five hundred twenty-one billion, two hundred twenty-five million, thirty-three thousand, four hundred thirty-one".