2151345449 has 4 divisors (see below), whose sum is σ = 2346922320. Its totient is φ = 1955768580.

The previous prime is 2151345437. The next prime is 2151345467. The reversal of 2151345449 is 9445431512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2151345449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2151345149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97788419 + ... + 97788440.

It is an arithmetic number, because the mean of its divisors is an integer number (586730580).

Almost surely, 2^2151345449 is an apocalyptic number.

It is an amenable number.

2151345449 is a deficient number, since it is larger than the sum of its proper divisors (195576871).

2151345449 is a wasteful number, since it uses less digits than its factorization.

2151345449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195576870.

The product of its digits is 86400, while the sum is 38.

The square root of 2151345449 is about 46382.5985580799. The cubic root of 2151345449 is about 1290.9320526082.

The spelling of 2151345449 in words is "two billion, one hundred fifty-one million, three hundred forty-five thousand, four hundred forty-nine".