345721051 has 8 divisors (see below), whose sum is σ = 375248384. Its totient is φ = 316612800.

The previous prime is 345721039. The next prime is 345721063. The reversal of 345721051 is 150127543.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (345721039) and next prime (345721063).

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

It is a cyclic number.

It is not a de Polignac number, because 345721051 - 2⁷ = 345720923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345721031) 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, 103050 + ... + 106351.

It is an arithmetic number, because the mean of its divisors is an integer number (46906048).

Almost surely, 2^345721051 is an apocalyptic number.

345721051 is a deficient number, since it is larger than the sum of its proper divisors (29527333).

345721051 is a wasteful number, since it uses less digits than its factorization.

345721051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209541.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 345721051 is about 18593.5755302739. The cubic root of 345721051 is about 701.8461816973.

Adding to 345721051 its reverse (150127543), we get a palindrome (495848594).

The spelling of 345721051 in words is "three hundred forty-five million, seven hundred twenty-one thousand, fifty-one".