2031145405 has 8 divisors (see below), whose sum is σ = 2438953272. Its totient is φ = 1623863808.

The previous prime is 2031145393. The next prime is 2031145469. The reversal of 2031145405 is 5045411302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11002489 + 2020142916 = 3317^2 + 44946^2 .

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 2031145405 - 2¹⁵ = 2031112637 is a prime.

It is a super-2 number, since 2×2031145405² = 8251103312505228050, 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 2031145405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123024 + ... + 138553.

It is an arithmetic number, because the mean of its divisors is an integer number (304869159).

Almost surely, 2^2031145405 is an apocalyptic number.

It is an amenable number.

2031145405 is a deficient number, since it is larger than the sum of its proper divisors (407807867).

2031145405 is a wasteful number, since it uses less digits than its factorization.

2031145405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263135.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2031145405 is about 45068.2305510212. The cubic root of 2031145405 is about 1266.4275166774.

Adding to 2031145405 its reverse (5045411302), we get a palindrome (7076556707).

The spelling of 2031145405 in words is "two billion, thirty-one million, one hundred forty-five thousand, four hundred five".