101553145 has 4 divisors (see below), whose sum is σ = 121863780. Its totient is φ = 81242512.

The previous prime is 101553139. The next prime is 101553161. The reversal of 101553145 is 541355101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541355101 = 7 ⋅77336443.

It can be written as a sum of positive squares in 2 ways, for example, as 30791401 + 70761744 = 5549^2 + 8412^2 .

It is a cyclic number.

It is not a de Polignac number, because 101553145 - 2⁵ = 101553113 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10155310 + ... + 10155319.

It is an arithmetic number, because the mean of its divisors is an integer number (30465945).

Almost surely, 2^101553145 is an apocalyptic number.

It is an amenable number.

101553145 is a deficient number, since it is larger than the sum of its proper divisors (20310635).

101553145 is an equidigital number, since it uses as much as digits as its factorization.

101553145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20310634.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 101553145 is about 10077.3580367078. The cubic root of 101553145 is about 466.5495689759.

The spelling of 101553145 in words is "one hundred one million, five hundred fifty-three thousand, one hundred forty-five".