145431322551 has 12 divisors (see below), whose sum is σ = 210070955640. Its totient is φ = 96952604400.

The previous prime is 145431322523. The next prime is 145431322591. The reversal of 145431322551 is 155223134541.

145431322551 is a `hidden beast` number, since 1 + 4 + 54 + 31 + 3 + 22 + 551 = 666.

It is not a de Polignac number, because 145431322551 - 2¹³ = 145431314359 is a prime.

It is a super-2 number, since 2×145431322551² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145431322591) 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 11 ways as a sum of consecutive naturals, for example, 731601 + ... + 908901.

It is an arithmetic number, because the mean of its divisors is an integer number (17505912970).

Almost surely, 2^145431322551 is an apocalyptic number.

145431322551 is a deficient number, since it is larger than the sum of its proper divisors (64639633089).

145431322551 is a wasteful number, since it uses less digits than its factorization.

145431322551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268446 (or 268443 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The spelling of 145431322551 in words is "one hundred forty-five billion, four hundred thirty-one million, three hundred twenty-two thousand, five hundred fifty-one".