10191621 has 16 divisors (see below), whose sum is σ = 15141888. Its totient is φ = 6044400.

The previous prime is 10191611. The next prime is 10191631. The reversal of 10191621 is 12619101.

It is an interprime number because it is at equal distance from previous prime (10191611) and next prime (10191631).

It is not a de Polignac number, because 10191621 - 2¹³ = 10183429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10191611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1735 + ... + 4836.

It is an arithmetic number, because the mean of its divisors is an integer number (946368).

Almost surely, 2^10191621 is an apocalyptic number.

10191621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10191621 is a deficient number, since it is larger than the sum of its proper divisors (4950267).

10191621 is a wasteful number, since it uses less digits than its factorization.

10191621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6632.

The product of its (nonzero) digits is 108, while the sum is 21.

The square root of 10191621 is about 3192.4318316919. The cubic root of 10191621 is about 216.8108880690.

The spelling of 10191621 in words is "ten million, one hundred ninety-one thousand, six hundred twenty-one".