101881625 has 8 divisors (see below), whose sum is σ = 127148424. Its totient is φ = 81505200.

The previous prime is 101881621. The next prime is 101881631. The reversal of 101881625 is 526188101.

It can be written as a sum of positive squares in 4 ways, for example, as 597529 + 101284096 = 773^2 + 10064^2 .

It is not a de Polignac number, because 101881625 - 2² = 101881621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101881591 and 101881600.

It is not an unprimeable number, because it can be changed into a prime (101881621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407402 + ... + 407651.

It is an arithmetic number, because the mean of its divisors is an integer number (15893553).

Almost surely, 2^101881625 is an apocalyptic number.

It is an amenable number.

101881625 is a deficient number, since it is larger than the sum of its proper divisors (25266799).

101881625 is an frugal number, since it uses more digits than its factorization.

101881625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815068 (or 815058 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 32.

The square root of 101881625 is about 10093.6428012883. The cubic root of 101881625 is about 467.0520555117.

The spelling of 101881625 in words is "one hundred one million, eight hundred eighty-one thousand, six hundred twenty-five".