201137543261 has 4 divisors (see below), whose sum is σ = 201217904352. Its totient is φ = 201057182172.

The previous prime is 201137543239. The next prime is 201137543263. The reversal of 201137543261 is 162345731102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201137543261 - 2¹⁰ = 201137542237 is a prime.

It is a super-2 number, since 2×201137543261² (a number of 23 digits) 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 (201137543263) 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, 40176791 + ... + 40181796.

It is an arithmetic number, because the mean of its divisors is an integer number (50304476088).

Almost surely, 2^201137543261 is an apocalyptic number.

It is an amenable number.

201137543261 is a deficient number, since it is larger than the sum of its proper divisors (80361091).

201137543261 is an equidigital number, since it uses as much as digits as its factorization.

201137543261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80361090.

The product of its (nonzero) digits is 30240, while the sum is 35.

The spelling of 201137543261 in words is "two hundred one billion, one hundred thirty-seven million, five hundred forty-three thousand, two hundred sixty-one".