2145236413 has 2 divisors, whose sum is σ = 2145236414. Its totient is φ = 2145236412.

The previous prime is 2145236411. The next prime is 2145236453. The reversal of 2145236413 is 3146325412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1957354564 + 187881849 = 44242^2 + 13707^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145236413 - 2¹ = 2145236411 is a prime.

It is a super-2 number, since 2×2145236413² = 9204078535322213138, which contains 22 as substring.

Together with 2145236411, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2145236411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072618206 + 1072618207.

It is an arithmetic number, because the mean of its divisors is an integer number (1072618207).

Almost surely, 2^2145236413 is an apocalyptic number.

It is an amenable number.

2145236413 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145236413 is an equidigital number, since it uses as much as digits as its factorization.

2145236413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 31.

The square root of 2145236413 is about 46316.6969137481. The cubic root of 2145236413 is about 1289.7089688599.

The spelling of 2145236413 in words is "two billion, one hundred forty-five million, two hundred thirty-six thousand, four hundred thirteen".