215452031 has 2 divisors, whose sum is σ = 215452032. Its totient is φ = 215452030.

The previous prime is 215452021. The next prime is 215452043. The reversal of 215452031 is 130254512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 215452031 - 2¹⁰ = 215451007 is a prime.

It is a super-2 number, since 2×215452031² = 92839155324049922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 215451988 and 215452006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215452021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107726015 + 107726016.

It is an arithmetic number, because the mean of its divisors is an integer number (107726016).

Almost surely, 2^215452031 is an apocalyptic number.

215452031 is a deficient number, since it is larger than the sum of its proper divisors (1).

215452031 is an equidigital number, since it uses as much as digits as its factorization.

215452031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 215452031 is about 14678.2843343492. The cubic root of 215452031 is about 599.4921916353.

The spelling of 215452031 in words is "two hundred fifteen million, four hundred fifty-two thousand, thirty-one".