145405215225 has 36 divisors (see below), whose sum is σ = 262425017712. Its totient is φ = 76957452000.

The previous prime is 145405215187. The next prime is 145405215227. The reversal of 145405215225 is 522512504541.

145405215225 is a `hidden beast` number, since 1 + 4 + 5 + 405 + 21 + 5 + 225 = 666.

It is not a de Polignac number, because 145405215225 - 2⁶ = 145405215161 is a prime.

It is a super-2 number, since 2×145405215225² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145405215225.

It is not an unprimeable number, because it can be changed into a prime (145405215227) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2437111 + ... + 2496060.

Almost surely, 2^145405215225 is an apocalyptic number.

145405215225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

145405215225 is a deficient number, since it is larger than the sum of its proper divisors (117019802487).

145405215225 is a wasteful number, since it uses less digits than its factorization.

145405215225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4933318 (or 4933310 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 36.

Adding to 145405215225 its reverse (522512504541), we get a palindrome (667917719766).

The spelling of 145405215225 in words is "one hundred forty-five billion, four hundred five million, two hundred fifteen thousand, two hundred twenty-five".