145220224213451 has 8 divisors (see below), whose sum is σ = 153773210301120. Its totient is φ = 136668418121088.

The previous prime is 145220224213411. The next prime is 145220224213487. The reversal of 145220224213451 is 154312422022541.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145220224213451 - 2³⁰ = 145219150471627 is a prime.

It is a super-2 number, since 2×145220224213451² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145220224213411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 294745436 + ... + 295237721.

It is an arithmetic number, because the mean of its divisors is an integer number (19221651287640).

Almost surely, 2^{145220224213451} is an apocalyptic number.

145220224213451 is a deficient number, since it is larger than the sum of its proper divisors (8552986087669).

145220224213451 is a wasteful number, since it uses less digits than its factorization.

145220224213451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589997653.

The product of its (nonzero) digits is 153600, while the sum is 38.

Adding to 145220224213451 its reverse (154312422022541), we get a palindrome (299532646235992).

The spelling of 145220224213451 in words is "one hundred forty-five trillion, two hundred twenty billion, two hundred twenty-four million, two hundred thirteen thousand, four hundred fifty-one".