1605631151 has 2 divisors, whose sum is σ = 1605631152. Its totient is φ = 1605631150.

The previous prime is 1605631103. The next prime is 1605631177. The reversal of 1605631151 is 1511365061.

It is a strong prime.

It is an emirp because it is prime and its reverse (1511365061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1605631151 - 2⁶ = 1605631087 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1605031151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802815575 + 802815576.

It is an arithmetic number, because the mean of its divisors is an integer number (802815576).

Almost surely, 2^1605631151 is an apocalyptic number.

1605631151 is a deficient number, since it is larger than the sum of its proper divisors (1).

1605631151 is an equidigital number, since it uses as much as digits as its factorization.

1605631151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 29.

The square root of 1605631151 is about 40070.3275629237. The cubic root of 1605631151 is about 1170.9776208171.

The spelling of 1605631151 in words is "one billion, six hundred five million, six hundred thirty-one thousand, one hundred fifty-one".