190513181 has 2 divisors, whose sum is σ = 190513182. Its totient is φ = 190513180.

The previous prime is 190513157. The next prime is 190513189. The reversal of 190513181 is 181315091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186868900 + 3644281 = 13670^2 + 1909^2 .

It is an emirp because it is prime and its reverse (181315091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 190513181 - 2²² = 186318877 is a prime.

It is a super-2 number, since 2×190513181² = 72590544269477522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190513189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95256590 + 95256591.

It is an arithmetic number, because the mean of its divisors is an integer number (95256591).

Almost surely, 2^190513181 is an apocalyptic number.

It is an amenable number.

190513181 is a deficient number, since it is larger than the sum of its proper divisors (1).

190513181 is an equidigital number, since it uses as much as digits as its factorization.

190513181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 29.

The square root of 190513181 is about 13802.6512308324. The cubic root of 190513181 is about 575.4068258929.

The spelling of 190513181 in words is "one hundred ninety million, five hundred thirteen thousand, one hundred eighty-one".