145213441113531 has 32 divisors (see below), whose sum is σ = 227282886724608. Its totient is φ = 80727625088640.

The previous prime is 145213441113493. The next prime is 145213441113541. The reversal of 145213441113531 is 135311144312541.

It is not a de Polignac number, because 145213441113531 - 2¹⁷ = 145213440982459 is a prime.

It is a super-2 number, since 2×145213441113531² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145213441113531.

It is not an unprimeable number, because it can be changed into a prime (145213441113541) 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 31 ways as a sum of consecutive naturals, for example, 3059535 + ... + 17314376.

It is an arithmetic number, because the mean of its divisors is an integer number (7102590210144).

Almost surely, 2^{145213441113531} is an apocalyptic number.

145213441113531 is a deficient number, since it is larger than the sum of its proper divisors (82069445611077).

145213441113531 is a wasteful number, since it uses less digits than its factorization.

145213441113531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20383131.

The product of its digits is 86400, while the sum is 39.

The spelling of 145213441113531 in words is "one hundred forty-five trillion, two hundred thirteen billion, four hundred forty-one million, one hundred thirteen thousand, five hundred thirty-one".