161381053 has 2 divisors, whose sum is σ = 161381054. Its totient is φ = 161381052.

The previous prime is 161381023. The next prime is 161381069. The reversal of 161381053 is 350183161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135187129 + 26193924 = 11627^2 + 5118^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161381053 is a prime.

It is equal to p_9047602 and since 161381053 and 9047602 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161381023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80690526 + 80690527.

It is an arithmetic number, because the mean of its divisors is an integer number (80690527).

Almost surely, 2^161381053 is an apocalyptic number.

It is an amenable number.

161381053 is a deficient number, since it is larger than the sum of its proper divisors (1).

161381053 is an equidigital number, since it uses as much as digits as its factorization.

161381053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 161381053 is about 12703.5842579959. The cubic root of 161381053 is about 544.4410317046.

The spelling of 161381053 in words is "one hundred sixty-one million, three hundred eighty-one thousand, fifty-three".