251343441 has 6 divisors (see below), whose sum is σ = 363051650. Its totient is φ = 167562288.

The previous prime is 251343431. The next prime is 251343461. The reversal of 251343441 is 144343152.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 161188416 + 90155025 = 12696^2 + 9495^2 .

It is not a de Polignac number, because 251343441 - 2²¹ = 249246289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251343401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13963516 + ... + 13963533.

Almost surely, 2^251343441 is an apocalyptic number.

It is an amenable number.

251343441 is a deficient number, since it is larger than the sum of its proper divisors (111708209).

251343441 is a wasteful number, since it uses less digits than its factorization.

251343441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27927055 (or 27927052 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 251343441 is about 15853.8147144465. The cubic root of 251343441 is about 631.0869294033.

Adding to 251343441 its reverse (144343152), we get a palindrome (395686593).

It can be divided in two parts, 2513 and 43441, that added together give a palindrome (45954).

The spelling of 251343441 in words is "two hundred fifty-one million, three hundred forty-three thousand, four hundred forty-one".