131355201 has 4 divisors (see below), whose sum is σ = 175140272. Its totient is φ = 87570132.

The previous prime is 131355199. The next prime is 131355223. The reversal of 131355201 is 102553131.

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 not a de Polignac number, because 131355201 - 2¹ = 131355199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131355241) 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, 21892531 + ... + 21892536.

It is an arithmetic number, because the mean of its divisors is an integer number (43785068).

Almost surely, 2^131355201 is an apocalyptic number.

It is an amenable number.

131355201 is a deficient number, since it is larger than the sum of its proper divisors (43785071).

131355201 is an equidigital number, since it uses as much as digits as its factorization.

131355201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43785070.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 131355201 is about 11461.0296657848. The cubic root of 131355201 is about 508.3339210839. Note that the first 3 decimals are identical.

It can be divided in two parts, 13135 and 5201, that added together give a triangular number (18336 = T₁₉₁).

The spelling of 131355201 in words is "one hundred thirty-one million, three hundred fifty-five thousand, two hundred one".