251472197 has 2 divisors, whose sum is σ = 251472198. Its totient is φ = 251472196.

The previous prime is 251472191. The next prime is 251472203. The reversal of 251472197 is 791274152.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (251472191) and next prime (251472203).

It can be written as a sum of positive squares in only one way, i.e., 226382116 + 25090081 = 15046^2 + 5009^2 .

It is a cyclic number.

It is not a de Polignac number, because 251472197 - 2¹⁸ = 251210053 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 251472197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251472191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125736098 + 125736099.

It is an arithmetic number, because the mean of its divisors is an integer number (125736099).

Almost surely, 2^251472197 is an apocalyptic number.

It is an amenable number.

251472197 is a deficient number, since it is larger than the sum of its proper divisors (1).

251472197 is an equidigital number, since it uses as much as digits as its factorization.

251472197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 38.

The square root of 251472197 is about 15857.8749206822. The cubic root of 251472197 is about 631.1946735551.

The spelling of 251472197 in words is "two hundred fifty-one million, four hundred seventy-two thousand, one hundred ninety-seven".