131605051 has 2 divisors, whose sum is σ = 131605052. Its totient is φ = 131605050.

The previous prime is 131605027. The next prime is 131605087. The reversal of 131605051 is 150506131.

It is a weak prime.

It is an emirp because it is prime and its reverse (150506131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131605051 - 2¹³ = 131596859 is a prime.

It is not a weakly prime, because it can be changed into another prime (131605151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65802525 + 65802526.

It is an arithmetic number, because the mean of its divisors is an integer number (65802526).

Almost surely, 2^131605051 is an apocalyptic number.

131605051 is a deficient number, since it is larger than the sum of its proper divisors (1).

131605051 is an equidigital number, since it uses as much as digits as its factorization.

131605051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 131605051 is about 11471.9244680219. The cubic root of 131605051 is about 508.6560166629.

The spelling of 131605051 in words is "one hundred thirty-one million, six hundred five thousand, fifty-one".