103211957 has 8 divisors (see below), whose sum is σ = 107455800. Its totient is φ = 99013824.

The previous prime is 103211929. The next prime is 103211963. The reversal of 103211957 is 759112301.

It can be written as a sum of positive squares in 4 ways, for example, as 33339076 + 69872881 = 5774^2 + 8359^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 103211957 - 2⁸ = 103211701 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103211657) 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, 6782 + ... + 15887.

It is an arithmetic number, because the mean of its divisors is an integer number (13431975).

Almost surely, 2^103211957 is an apocalyptic number.

It is an amenable number.

103211957 is a deficient number, since it is larger than the sum of its proper divisors (4243843).

103211957 is a wasteful number, since it uses less digits than its factorization.

103211957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22855.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 103211957 is about 10159.3285703338. The cubic root of 103211957 is about 469.0761344722.

The spelling of 103211957 in words is "one hundred three million, two hundred eleven thousand, nine hundred fifty-seven".