1515150191 has 2 divisors, whose sum is σ = 1515150192. Its totient is φ = 1515150190.

The previous prime is 1515150059. The next prime is 1515150223. The reversal of 1515150191 is 1910515151.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1515150191 - 2¹⁸ = 1514888047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1515150491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 757575095 + 757575096.

It is an arithmetic number, because the mean of its divisors is an integer number (757575096).

Almost surely, 2^1515150191 is an apocalyptic number.

1515150191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1515150191 is an equidigital number, since it uses as much as digits as its factorization.

1515150191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1125, while the sum is 29.

The square root of 1515150191 is about 38924.9301990383. The cubic root of 1515150191 is about 1148.5552597148. Note that the first 3 decimals are identical.

The spelling of 1515150191 in words is "one billion, five hundred fifteen million, one hundred fifty thousand, one hundred ninety-one".