2123240531 has 2 divisors, whose sum is σ = 2123240532. Its totient is φ = 2123240530.

The previous prime is 2123240527. The next prime is 2123240543. The reversal of 2123240531 is 1350423212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2123240531 - 2² = 2123240527 is a prime.

It is a super-2 number, since 2×2123240531² = 9016300704962323922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2123240497 and 2123240506.

It is not a weakly prime, because it can be changed into another prime (2123240731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061620265 + 1061620266.

It is an arithmetic number, because the mean of its divisors is an integer number (1061620266).

Almost surely, 2^2123240531 is an apocalyptic number.

2123240531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123240531 is an equidigital number, since it uses as much as digits as its factorization.

2123240531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 2123240531 is about 46078.6342137004. The cubic root of 2123240531 is about 1285.2858667448.

Adding to 2123240531 its reverse (1350423212), we get a palindrome (3473663743).

The spelling of 2123240531 in words is "two billion, one hundred twenty-three million, two hundred forty thousand, five hundred thirty-one".