201251158523 has 4 divisors (see below), whose sum is σ = 201261059160. Its totient is φ = 201241257888.

The previous prime is 201251158519. The next prime is 201251158573. The reversal of 201251158523 is 325851152102.

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 201251158523 - 2² = 201251158519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201251158513) 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, 4919765 + ... + 4960502.

It is an arithmetic number, because the mean of its divisors is an integer number (50315264790).

Almost surely, 2^201251158523 is an apocalyptic number.

201251158523 is a deficient number, since it is larger than the sum of its proper divisors (9900637).

201251158523 is an equidigital number, since it uses as much as digits as its factorization.

201251158523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9900636.

The product of its (nonzero) digits is 24000, while the sum is 35.

The spelling of 201251158523 in words is "two hundred one billion, two hundred fifty-one million, one hundred fifty-eight thousand, five hundred twenty-three".