2145545031 has 8 divisors (see below), whose sum is σ = 3269401984. Its totient is φ = 1226025720.

The previous prime is 2145545029. The next prime is 2145545057. The reversal of 2145545031 is 1305455412.

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

It is not a de Polignac number, because 2145545031 - 2¹ = 2145545029 is a prime.

It is a super-2 number, since 2×2145545031² = 9206726960097581922, which 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 2145545031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145545021) 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, 51084385 + ... + 51084426.

It is an arithmetic number, because the mean of its divisors is an integer number (408675248).

Almost surely, 2^2145545031 is an apocalyptic number.

2145545031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2145545031 is a deficient number, since it is larger than the sum of its proper divisors (1123856953).

2145545031 is a wasteful number, since it uses less digits than its factorization.

2145545031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102168821.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 2145545031 is about 46320.0284002504. The cubic root of 2145545031 is about 1289.7708125980.

The spelling of 2145545031 in words is "two billion, one hundred forty-five million, five hundred forty-five thousand, thirty-one".