215030149 has 2 divisors, whose sum is σ = 215030150. Its totient is φ = 215030148.

The previous prime is 215030147. The next prime is 215030171. The reversal of 215030149 is 941030512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 214827649 + 202500 = 14657^2 + 450^2 .

It is a cyclic number.

It is not a de Polignac number, because 215030149 - 2¹ = 215030147 is a prime.

Together with 215030147, 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 (215030147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107515074 + 107515075.

It is an arithmetic number, because the mean of its divisors is an integer number (107515075).

Almost surely, 2^215030149 is an apocalyptic number.

It is an amenable number.

215030149 is a deficient number, since it is larger than the sum of its proper divisors (1).

215030149 is an equidigital number, since it uses as much as digits as its factorization.

215030149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 215030149 is about 14663.9063349436. The cubic root of 215030149 is about 599.1006424149.

The spelling of 215030149 in words is "two hundred fifteen million, thirty thousand, one hundred forty-nine".