201256424615 has 4 divisors (see below), whose sum is σ = 241507709544. Its totient is φ = 161005139688.

The previous prime is 201256424609. The next prime is 201256424627. The reversal of 201256424615 is 516424652102.

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 201256424615 - 2¹⁰ = 201256423591 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 3 ways as a sum of consecutive naturals, for example, 20125642457 + ... + 20125642466.

It is an arithmetic number, because the mean of its divisors is an integer number (60376927386).

Almost surely, 2^201256424615 is an apocalyptic number.

201256424615 is a deficient number, since it is larger than the sum of its proper divisors (40251284929).

201256424615 is an equidigital number, since it uses as much as digits as its factorization.

201256424615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40251284928.

The product of its (nonzero) digits is 115200, while the sum is 38.

The spelling of 201256424615 in words is "two hundred one billion, two hundred fifty-six million, four hundred twenty-four thousand, six hundred fifteen".