345402251 has 2 divisors, whose sum is σ = 345402252. Its totient is φ = 345402250.

The previous prime is 345402223. The next prime is 345402263. The reversal of 345402251 is 152204543.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 345402251 - 2¹⁰ = 345401227 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 345402251.

It is not a weakly prime, because it can be changed into another prime (345402751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172701125 + 172701126.

It is an arithmetic number, because the mean of its divisors is an integer number (172701126).

Almost surely, 2^345402251 is an apocalyptic number.

345402251 is a deficient number, since it is larger than the sum of its proper divisors (1).

345402251 is an equidigital number, since it uses as much as digits as its factorization.

345402251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 345402251 is about 18585.0006994888. Note that the first 3 decimals coincide. The cubic root of 345402251 is about 701.6303840454.

Subtracting from 345402251 its sum of digits (26), we obtain a square (345402225 = 18585²).

Adding to 345402251 its reverse (152204543), we get a palindrome (497606794).

The spelling of 345402251 in words is "three hundred forty-five million, four hundred two thousand, two hundred fifty-one".