2145203031 has 8 divisors (see below), whose sum is σ = 2984630400. Its totient is φ = 1367955512.

The previous prime is 2145203003. The next prime is 2145203041. The reversal of 2145203031 is 1303025412.

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

It is a cyclic number.

It is not a de Polignac number, because 2145203031 - 2⁶ = 2145202967 is a prime.

It is a super-2 number, since 2×2145203031² = 9203792088423173922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2145202989 and 2145203007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145203041) 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, 15544881 + ... + 15545018.

It is an arithmetic number, because the mean of its divisors is an integer number (373078800).

Almost surely, 2^2145203031 is an apocalyptic number.

2145203031 is a deficient number, since it is larger than the sum of its proper divisors (839427369).

2145203031 is a wasteful number, since it uses less digits than its factorization.

2145203031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31089925.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 2145203031 is about 46316.3365455430. The cubic root of 2145203031 is about 1289.7022791095.

Adding to 2145203031 its reverse (1303025412), we get a palindrome (3448228443).

The spelling of 2145203031 in words is "two billion, one hundred forty-five million, two hundred three thousand, thirty-one".