7145745071531 has 8 divisors (see below), whose sum is σ = 7795654000704. Its totient is φ = 6495885432520.

The previous prime is 7145745071419. The next prime is 7145745071533. The reversal of 7145745071531 is 1351705475417.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7145745071531 - 2³⁰ = 7144671329707 is a prime.

It is a super-2 number, since 2×7145745071531² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7145745071531.

It is not an unprimeable number, because it can be changed into a prime (7145745071533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12019085 + ... + 12599598.

It is an arithmetic number, because the mean of its divisors is an integer number (974456750088).

Almost surely, 2^{7145745071531} is an apocalyptic number.

7145745071531 is a deficient number, since it is larger than the sum of its proper divisors (649908929173).

7145745071531 is a wasteful number, since it uses less digits than its factorization.

7145745071531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24645081.

The product of its (nonzero) digits is 2058000, while the sum is 50.

The spelling of 7145745071531 in words is "seven trillion, one hundred forty-five billion, seven hundred forty-five million, seventy-one thousand, five hundred thirty-one".