101161557 has 12 divisors (see below), whose sum is σ = 166996960. Its totient is φ = 57806568.

The previous prime is 101161523. The next prime is 101161561. The reversal of 101161557 is 755161101.

It is a happy number.

101161557 is a `hidden beast` number, since 101 + 1 + 6 + 1 + 557 = 666.

It is not a de Polignac number, because 101161557 - 2⁶ = 101161493 is a prime.

It is a super-2 number, since 2×101161557² = 20467321229328498, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 101161557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101161517) 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 in 11 ways as a sum of consecutive naturals, for example, 802807 + ... + 802932.

Almost surely, 2^101161557 is an apocalyptic number.

It is an amenable number.

101161557 is a deficient number, since it is larger than the sum of its proper divisors (65835403).

101161557 is a wasteful number, since it uses less digits than its factorization.

101161557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605752 (or 1605749 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 27.

The square root of 101161557 is about 10057.9101706070. The cubic root of 101161557 is about 465.9491262532.

The spelling of 101161557 in words is "one hundred one million, one hundred sixty-one thousand, five hundred fifty-seven".