101981445 has 8 divisors (see below), whose sum is σ = 163170336. Its totient is φ = 54390096.

The previous prime is 101981401. The next prime is 101981479. The reversal of 101981445 is 544189101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 101981445 - 2¹⁷ = 101850373 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3399367 + ... + 3399396.

It is an arithmetic number, because the mean of its divisors is an integer number (20396292).

Almost surely, 2^101981445 is an apocalyptic number.

101981445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

101981445 is a deficient number, since it is larger than the sum of its proper divisors (61188891).

101981445 is an equidigital number, since it uses as much as digits as its factorization.

101981445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6798771.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 101981445 is about 10098.5862871988. The cubic root of 101981445 is about 467.2045393986.

The spelling of 101981445 in words is "one hundred one million, nine hundred eighty-one thousand, four hundred forty-five".