162521951 has 2 divisors, whose sum is σ = 162521952. Its totient is φ = 162521950.

The previous prime is 162521923. The next prime is 162521963. The reversal of 162521951 is 159125261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 162521951 - 2¹⁸ = 162259807 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 (162521981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81260975 + 81260976.

It is an arithmetic number, because the mean of its divisors is an integer number (81260976).

Almost surely, 2^162521951 is an apocalyptic number.

162521951 is a deficient number, since it is larger than the sum of its proper divisors (1).

162521951 is an equidigital number, since it uses as much as digits as its factorization.

162521951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 32.

The square root of 162521951 is about 12748.4097439641. The cubic root of 162521951 is about 545.7210118757.

The spelling of 162521951 in words is "one hundred sixty-two million, five hundred twenty-one thousand, nine hundred fifty-one".