201522379 has 4 divisors (see below), whose sum is σ = 212128840. Its totient is φ = 190915920.

The previous prime is 201522287. The next prime is 201522401. The reversal of 201522379 is 973225102.

201522379 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201522379 - 2²³ = 193133771 is a prime.

It is a super-2 number, since 2×201522379² = 81222538475639282, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201522379.

It is not an unprimeable number, because it can be changed into a prime (201520379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5303202 + ... + 5303239.

It is an arithmetic number, because the mean of its divisors is an integer number (53032210).

Almost surely, 2^201522379 is an apocalyptic number.

201522379 is a deficient number, since it is larger than the sum of its proper divisors (10606461).

201522379 is a wasteful number, since it uses less digits than its factorization.

201522379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10606460.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 201522379 is about 14195.8578113476. The cubic root of 201522379 is about 586.2836196534.

The spelling of 201522379 in words is "two hundred one million, five hundred twenty-two thousand, three hundred seventy-nine".