215442023423501 has 32 divisors (see below), whose sum is σ = 248369822242560. Its totient is φ = 183060791087616.

The previous prime is 215442023423491. The next prime is 215442023423509. The reversal of 215442023423501 is 105324320244512.

It is a cyclic number.

It is not a de Polignac number, because 215442023423501 - 2²² = 215442019229197 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 (215442023423509) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 327955970 + ... + 328612236.

It is an arithmetic number, because the mean of its divisors is an integer number (7761556945080).

Almost surely, 2^{215442023423501} is an apocalyptic number.

It is an amenable number.

215442023423501 is a deficient number, since it is larger than the sum of its proper divisors (32927798819059).

215442023423501 is a wasteful number, since it uses less digits than its factorization.

215442023423501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657413.

The product of its (nonzero) digits is 230400, while the sum is 38.

The spelling of 215442023423501 in words is "two hundred fifteen trillion, four hundred forty-two billion, twenty-three million, four hundred twenty-three thousand, five hundred one".