1340222351 has 8 divisors (see below), whose sum is σ = 1506069600. Its totient is φ = 1183339872.

The previous prime is 1340222329. The next prime is 1340222357. The reversal of 1340222351 is 1532220431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1340222351 - 2¹⁰ = 1340221327 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340222357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2240876 + ... + 2241473.

It is an arithmetic number, because the mean of its divisors is an integer number (188258700).

Almost surely, 2^1340222351 is an apocalyptic number.

1340222351 is a deficient number, since it is larger than the sum of its proper divisors (165847249).

1340222351 is a wasteful number, since it uses less digits than its factorization.

1340222351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4482385.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1340222351 is about 36609.0473926870. The cubic root of 1340222351 is about 1102.5347472179.

Adding to 1340222351 its reverse (1532220431), we get a palindrome (2872442782).

It can be divided in two parts, 13402 and 22351, that added together give a palindrome (35753).

The spelling of 1340222351 in words is "one billion, three hundred forty million, two hundred twenty-two thousand, three hundred fifty-one".