145521311231452 has 48 divisors (see below), whose sum is σ = 278992680624000. Its totient is φ = 66003382388160.

The previous prime is 145521311231371. The next prime is 145521311231453. The reversal of 145521311231452 is 254132113125541.

It is a super-2 number, since 2×145521311231452² (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 (145521311231453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1361299 + ... + 17114197.

It is an arithmetic number, because the mean of its divisors is an integer number (5812347513000).

Almost surely, 2^{145521311231452} is an apocalyptic number.

It is an amenable number.

145521311231452 is a deficient number, since it is larger than the sum of its proper divisors (133471369392548).

145521311231452 is a wasteful number, since it uses less digits than its factorization.

145521311231452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15755986 (or 15755984 counting only the distinct ones).

The product of its digits is 144000, while the sum is 40.

Adding to 145521311231452 its reverse (254132113125541), we get a palindrome (399653424356993).

The spelling of 145521311231452 in words is "one hundred forty-five trillion, five hundred twenty-one billion, three hundred eleven million, two hundred thirty-one thousand, four hundred fifty-two".