215641983 has 8 divisors (see below), whose sum is σ = 296797696. Its totient is φ = 139123800.

The previous prime is 215641939. The next prime is 215642027. The reversal of 215641983 is 389146512.

It is an interprime number because it is at equal distance from previous prime (215641939) and next prime (215642027).

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

It is not a de Polignac number, because 215641983 - 2²² = 211447679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215642983) 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, 1159273 + ... + 1159458.

It is an arithmetic number, because the mean of its divisors is an integer number (37099712).

Almost surely, 2^215641983 is an apocalyptic number.

215641983 is a deficient number, since it is larger than the sum of its proper divisors (81155713).

215641983 is a wasteful number, since it uses less digits than its factorization.

215641983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2318765.

The product of its digits is 51840, while the sum is 39.

The square root of 215641983 is about 14684.7534197888. The cubic root of 215641983 is about 599.6683194583.

The spelling of 215641983 in words is "two hundred fifteen million, six hundred forty-one thousand, nine hundred eighty-three".