251198041 has 2 divisors, whose sum is σ = 251198042. Its totient is φ = 251198040.

The previous prime is 251198023. The next prime is 251198047. The reversal of 251198041 is 140891152.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 244015641 + 7182400 = 15621^2 + 2680^2 .

It is a cyclic number.

It is not a de Polignac number, because 251198041 - 2²⁷ = 116980313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 251197994 and 251198012.

It is not a weakly prime, because it can be changed into another prime (251198047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125599020 + 125599021.

It is an arithmetic number, because the mean of its divisors is an integer number (125599021).

Almost surely, 2^251198041 is an apocalyptic number.

It is an amenable number.

251198041 is a deficient number, since it is larger than the sum of its proper divisors (1).

251198041 is an equidigital number, since it uses as much as digits as its factorization.

251198041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 251198041 is about 15849.2284039318. The cubic root of 251198041 is about 630.9652131586.

The spelling of 251198041 in words is "two hundred fifty-one million, one hundred ninety-eight thousand, forty-one".