201506721215 has 8 divisors (see below), whose sum is σ = 241819533648. Its totient is φ = 161197731520.

The previous prime is 201506721179. The next prime is 201506721281. The reversal of 201506721215 is 512127605102.

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

It is not a de Polignac number, because 201506721215 - 2²⁶ = 201439612351 is a prime.

It is a Duffinian number.

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, 838406 + ... + 1051635.

It is an arithmetic number, because the mean of its divisors is an integer number (30227441706).

Almost surely, 2^201506721215 is an apocalyptic number.

201506721215 is a deficient number, since it is larger than the sum of its proper divisors (40312812433).

201506721215 is a wasteful number, since it uses less digits than its factorization.

201506721215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1911369.

The product of its (nonzero) digits is 8400, while the sum is 32.

The spelling of 201506721215 in words is "two hundred one billion, five hundred six million, seven hundred twenty-one thousand, two hundred fifteen".