101552405 has 4 divisors (see below), whose sum is σ = 121862892. Its totient is φ = 81241920.

The previous prime is 101552389. The next prime is 101552447. The reversal of 101552405 is 504255101.

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: 504255101 = 7 ⋅72036443.

It can be written as a sum of positive squares in 2 ways, for example, as 28313041 + 73239364 = 5321^2 + 8558^2 .

It is not a de Polignac number, because 101552405 - 2⁴ = 101552389 is a prime.

It is a super-2 number, since 2×101552405² = 20625781922568050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10155236 + ... + 10155245.

It is an arithmetic number, because the mean of its divisors is an integer number (30465723).

Almost surely, 2^101552405 is an apocalyptic number.

It is an amenable number.

101552405 is a deficient number, since it is larger than the sum of its proper divisors (20310487).

101552405 is an equidigital number, since it uses as much as digits as its factorization.

101552405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20310486.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 101552405 is about 10077.3213206685. The cubic root of 101552405 is about 466.5484357514.

The spelling of 101552405 in words is "one hundred one million, five hundred fifty-two thousand, four hundred five".