340520251 has 16 divisors (see below), whose sum is σ = 366569280. Its totient is φ = 315187200.

The previous prime is 340520231. The next prime is 340520303. The reversal of 340520251 is 152025043.

It is a cyclic number.

It is not a de Polignac number, because 340520251 - 2¹³ = 340512059 is a prime.

It is a super-2 number, since 2×340520251² = 231908082682206002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340520231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279195 + ... + 280411.

It is an arithmetic number, because the mean of its divisors is an integer number (22910580).

Almost surely, 2^340520251 is an apocalyptic number.

340520251 is a deficient number, since it is larger than the sum of its proper divisors (26049029).

340520251 is a wasteful number, since it uses less digits than its factorization.

340520251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1494.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 340520251 is about 18453.1908080960. The cubic root of 340520251 is about 698.3090143039.

Adding to 340520251 its reverse (152025043), we get a palindrome (492545294).

The spelling of 340520251 in words is "three hundred forty million, five hundred twenty thousand, two hundred fifty-one".