145220224215031 has 16 divisors (see below), whose sum is σ = 166072509273088. Its totient is φ = 124394577703200.

The previous prime is 145220224215019. The next prime is 145220224215037. The reversal of 145220224215031 is 130512422022541.

It is a de Polignac number, because none of the positive numbers 2^k-145220224215031 is a prime.

It is a super-2 number, since 2×145220224215031² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145220224215037) 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, 531254716 + ... + 531527998.

It is an arithmetic number, because the mean of its divisors is an integer number (10379531829568).

Almost surely, 2^{145220224215031} is an apocalyptic number.

145220224215031 is a deficient number, since it is larger than the sum of its proper divisors (20852285058057).

145220224215031 is a wasteful number, since it uses less digits than its factorization.

145220224215031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321742.

The product of its (nonzero) digits is 38400, while the sum is 34.

Adding to 145220224215031 its reverse (130512422022541), we get a palindrome (275732646237572).

The spelling of 145220224215031 in words is "one hundred forty-five trillion, two hundred twenty billion, two hundred twenty-four million, two hundred fifteen thousand, thirty-one".