145520333431 has 16 divisors (see below), whose sum is σ = 162645090048. Its totient is φ = 129083270400.

The previous prime is 145520333389. The next prime is 145520333471. The reversal of 145520333431 is 134333025541.

It is a cyclic number.

It is not a de Polignac number, because 145520333431 - 2¹³ = 145520325239 is a prime.

It is a super-2 number, since 2×145520333431² (a number of 23 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 (145520333471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 884685 + ... + 1036198.

It is an arithmetic number, because the mean of its divisors is an integer number (10165318128).

Almost surely, 2^145520333431 is an apocalyptic number.

145520333431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

145520333431 is a deficient number, since it is larger than the sum of its proper divisors (17124756617).

145520333431 is a wasteful number, since it uses less digits than its factorization.

145520333431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921062.

The product of its (nonzero) digits is 64800, while the sum is 34.

Adding to 145520333431 its reverse (134333025541), we get a palindrome (279853358972).

The spelling of 145520333431 in words is "one hundred forty-five billion, five hundred twenty million, three hundred thirty-three thousand, four hundred thirty-one".