163557701 has 2 divisors, whose sum is σ = 163557702. Its totient is φ = 163557700.

The previous prime is 163557689. The next prime is 163557721. The reversal of 163557701 is 107755361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158105476 + 5452225 = 12574^2 + 2335^2 .

It is a cyclic number.

It is not a de Polignac number, because 163557701 - 2⁶ = 163557637 is a prime.

It is a super-2 number, since 2×163557701² = 53502243112810802, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p_9162728 and since 163557701 and 9162728 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 (163557721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81778850 + 81778851.

It is an arithmetic number, because the mean of its divisors is an integer number (81778851).

Almost surely, 2^163557701 is an apocalyptic number.

It is an amenable number.

163557701 is a deficient number, since it is larger than the sum of its proper divisors (1).

163557701 is an equidigital number, since it uses as much as digits as its factorization.

163557701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22050, while the sum is 35.

The square root of 163557701 is about 12788.9679411593. The cubic root of 163557701 is about 546.8778485011.

The spelling of 163557701 in words is "one hundred sixty-three million, five hundred fifty-seven thousand, seven hundred one".