315453421 has 4 divisors (see below), whose sum is σ = 316248412. Its totient is φ = 314658432.

The previous prime is 315453389. The next prime is 315453443. The reversal of 315453421 is 124354513.

315453421 = T₄₆ + T₄₇ + ... + T₁₂₃₆.

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

It can be written as a sum of positive squares in 2 ways, for example, as 93026025 + 222427396 = 9645^2 + 14914^2 .

It is a cyclic number.

It is not a de Polignac number, because 315453421 - 2⁵ = 315453389 is a prime.

It is a super-5 number, since 5×315453421⁵ (a number of 44 digits) contains 55555 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 315453421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315453451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 396900 + ... + 397693.

It is an arithmetic number, because the mean of its divisors is an integer number (79062103).

Almost surely, 2^315453421 is an apocalyptic number.

It is an amenable number.

315453421 is a deficient number, since it is larger than the sum of its proper divisors (794991).

315453421 is an equidigital number, since it uses as much as digits as its factorization.

315453421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794990.

The product of its digits is 7200, while the sum is 28.

The square root of 315453421 is about 17761.0084454684. The cubic root of 315453421 is about 680.7355226177.

The spelling of 315453421 in words is "three hundred fifteen million, four hundred fifty-three thousand, four hundred twenty-one".