201506623 has 4 divisors (see below), whose sum is σ = 201561840. Its totient is φ = 201451408.

The previous prime is 201506621. The next prime is 201506633. The reversal of 201506623 is 326605102.

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 201506623 - 2¹ = 201506621 is a prime.

It is a super-2 number, since 2×201506623² = 81209838225728258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201506621) 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, 21715 + ... + 29572.

It is an arithmetic number, because the mean of its divisors is an integer number (50390460).

Almost surely, 2^201506623 is an apocalyptic number.

201506623 is a deficient number, since it is larger than the sum of its proper divisors (55217).

201506623 is an equidigital number, since it uses as much as digits as its factorization.

201506623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55216.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 201506623 is about 14195.3028498866. The cubic root of 201506623 is about 586.2683397533.

The spelling of 201506623 in words is "two hundred one million, five hundred six thousand, six hundred twenty-three".