251122741 has 2 divisors, whose sum is σ = 251122742. Its totient is φ = 251122740.

The previous prime is 251122733. The next prime is 251122771. The reversal of 251122741 is 147221152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 247936516 + 3186225 = 15746^2 + 1785^2 .

It is a cyclic number.

It is not a de Polignac number, because 251122741 - 2³ = 251122733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251122721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125561370 + 125561371.

It is an arithmetic number, because the mean of its divisors is an integer number (125561371).

Almost surely, 2^251122741 is an apocalyptic number.

It is an amenable number.

251122741 is a deficient number, since it is larger than the sum of its proper divisors (1).

251122741 is an equidigital number, since it uses as much as digits as its factorization.

251122741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1120, while the sum is 25.

The square root of 251122741 is about 15846.8527159181. The cubic root of 251122741 is about 630.9021600809.

Adding to 251122741 its reverse (147221152), we get a palindrome (398343893).

It can be divided in two parts, 2511 and 22741, that added together give a palindrome (25252).

The spelling of 251122741 in words is "two hundred fifty-one million, one hundred twenty-two thousand, seven hundred forty-one".