251201849 has 2 divisors, whose sum is σ = 251201850. Its totient is φ = 251201848.

The previous prime is 251201803. The next prime is 251201861. The reversal of 251201849 is 948102152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 227044624 + 24157225 = 15068^2 + 4915^2 .

It is a cyclic number.

It is not a de Polignac number, because 251201849 - 2²⁴ = 234424633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (251201449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125600924 + 125600925.

It is an arithmetic number, because the mean of its divisors is an integer number (125600925).

Almost surely, 2^251201849 is an apocalyptic number.

It is an amenable number.

251201849 is a deficient number, since it is larger than the sum of its proper divisors (1).

251201849 is an equidigital number, since it uses as much as digits as its factorization.

251201849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 251201849 is about 15849.3485355077. The cubic root of 251201849 is about 630.9684014841.

The spelling of 251201849 in words is "two hundred fifty-one million, two hundred one thousand, eight hundred forty-nine".