2151340346 has 4 divisors (see below), whose sum is σ = 3227010522. Its totient is φ = 1075670172.

The previous prime is 2151340343. The next prime is 2151340349. The reversal of 2151340346 is 6430431512.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2151340343) and next prime (2151340349).

It can be written as a sum of positive squares in only one way, i.e., 1174090225 + 977250121 = 34265^2 + 31261^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2151340343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 537835085 + ... + 537835088.

Almost surely, 2^2151340346 is an apocalyptic number.

2151340346 is a deficient number, since it is larger than the sum of its proper divisors (1075670176).

2151340346 is a wasteful number, since it uses less digits than its factorization.

2151340346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075670175.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 2151340346 is about 46382.5435481928. The cubic root of 2151340346 is about 1290.9310319087.

Adding to 2151340346 its reverse (6430431512), we get a palindrome (8581771858).

The spelling of 2151340346 in words is "two billion, one hundred fifty-one million, three hundred forty thousand, three hundred forty-six".