171620552 has 8 divisors (see below), whose sum is σ = 321788550. Its totient is φ = 85810272.

The previous prime is 171620551. The next prime is 171620563. The reversal of 171620552 is 255026171.

It can be written as a sum of positive squares in only one way, i.e., 140327716 + 31292836 = 11846^2 + 5594^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×171620552² = 58907227737569408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (171620551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10726277 + ... + 10726292.

Almost surely, 2^171620552 is an apocalyptic number.

It is an amenable number.

171620552 is a deficient number, since it is larger than the sum of its proper divisors (150167998).

171620552 is a wasteful number, since it uses less digits than its factorization.

171620552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21452575 (or 21452571 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 171620552 is about 13100.4027419007. The cubic root of 171620552 is about 555.7205175431.

The spelling of 171620552 in words is "one hundred seventy-one million, six hundred twenty thousand, five hundred fifty-two".