2145892531 has 4 divisors (see below), whose sum is σ = 2145997000. Its totient is φ = 2145788064.

The previous prime is 2145892459. The next prime is 2145892537. The reversal of 2145892531 is 1352985412.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2145892531 - 2¹⁷ = 2145761459 is a prime.

It is a super-2 number, since 2×2145892531² = 9209709509203171922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145892537) 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, 10086 + ... + 66283.

It is an arithmetic number, because the mean of its divisors is an integer number (536499250).

Almost surely, 2^2145892531 is an apocalyptic number.

2145892531 is a deficient number, since it is larger than the sum of its proper divisors (104469).

2145892531 is an equidigital number, since it uses as much as digits as its factorization.

2145892531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104468.

The product of its digits is 86400, while the sum is 40.

The square root of 2145892531 is about 46323.7793255257. The cubic root of 2145892531 is about 1289.8404407742.

The spelling of 2145892531 in words is "two billion, one hundred forty-five million, eight hundred ninety-two thousand, five hundred thirty-one".