2145353522531 has 4 divisors (see below), whose sum is σ = 2161013037432. Its totient is φ = 2129694007632.

The previous prime is 2145353522519. The next prime is 2145353522573. The reversal of 2145353522531 is 1352253535412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2145353522531 is a prime.

It is a super-2 number, since 2×2145353522531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145353528531) 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, 7829757245 + ... + 7829757518.

It is an arithmetic number, because the mean of its divisors is an integer number (540253259358).

Almost surely, 2^{2145353522531} is an apocalyptic number.

2145353522531 is a deficient number, since it is larger than the sum of its proper divisors (15659514901).

2145353522531 is a wasteful number, since it uses less digits than its factorization.

2145353522531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15659514900.

The product of its digits is 540000, while the sum is 41.

The spelling of 2145353522531 in words is "two trillion, one hundred forty-five billion, three hundred fifty-three million, five hundred twenty-two thousand, five hundred thirty-one".