340023251 has 2 divisors, whose sum is σ = 340023252. Its totient is φ = 340023250.

The previous prime is 340023247. The next prime is 340023253. The reversal of 340023251 is 152320043.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 340023251 - 2² = 340023247 is a prime.

It is a super-2 number, since 2×340023251² = 231231622441218002, which contains 22 as substring.

Together with 340023253, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (340023253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170011625 + 170011626.

It is an arithmetic number, because the mean of its divisors is an integer number (170011626).

Almost surely, 2^340023251 is an apocalyptic number.

340023251 is a deficient number, since it is larger than the sum of its proper divisors (1).

340023251 is an equidigital number, since it uses as much as digits as its factorization.

340023251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 340023251 is about 18439.7193850666. The cubic root of 340023251 is about 697.9691142400.

Adding to 340023251 its reverse (152320043), we get a palindrome (492343294).

The spelling of 340023251 in words is "three hundred forty million, twenty-three thousand, two hundred fifty-one".