145533502505431 has 4 divisors (see below), whose sum is σ = 145559228779872. Its totient is φ = 145507776230992.

The previous prime is 145533502505401. The next prime is 145533502505437. The reversal of 145533502505431 is 134505205335541.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145533502505431 - 2¹¹ = 145533502503383 is a prime.

It is a super-2 number, since 2×145533502505431² (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 (145533502505437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12863128735 + ... + 12863140048.

It is an arithmetic number, because the mean of its divisors is an integer number (36389807194968).

Almost surely, 2^{145533502505431} is an apocalyptic number.

145533502505431 is a deficient number, since it is larger than the sum of its proper divisors (25726274441).

145533502505431 is an equidigital number, since it uses as much as digits as its factorization.

145533502505431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25726274440.

The product of its (nonzero) digits is 2700000, while the sum is 46.

The spelling of 145533502505431 in words is "one hundred forty-five trillion, five hundred thirty-three billion, five hundred two million, five hundred five thousand, four hundred thirty-one".