201178451 has 2 divisors, whose sum is σ = 201178452. Its totient is φ = 201178450.

The previous prime is 201178433. The next prime is 201178457. The reversal of 201178451 is 154871102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201178451 - 2¹⁸ = 200916307 is a prime.

It is not a weakly prime, because it can be changed into another prime (201178457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100589225 + 100589226.

It is an arithmetic number, because the mean of its divisors is an integer number (100589226).

Almost surely, 2^201178451 is an apocalyptic number.

201178451 is a deficient number, since it is larger than the sum of its proper divisors (1).

201178451 is an equidigital number, since it uses as much as digits as its factorization.

201178451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 201178451 is about 14183.7389640391. The cubic root of 201178451 is about 585.9499029187.

The spelling of 201178451 in words is "two hundred one million, one hundred seventy-eight thousand, four hundred fifty-one".