331452421 has 2 divisors, whose sum is σ = 331452422. Its totient is φ = 331452420.

The previous prime is 331452419. The next prime is 331452427. The reversal of 331452421 is 124254133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212751396 + 118701025 = 14586^2 + 10895^2 .

It is a cyclic number.

It is not a de Polignac number, because 331452421 - 2¹ = 331452419 is a prime.

It is a super-2 number, since 2×331452421² = 219721414773522482, which contains 22 as substring.

Together with 331452419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331452427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165726210 + 165726211.

It is an arithmetic number, because the mean of its divisors is an integer number (165726211).

Almost surely, 2^331452421 is an apocalyptic number.

It is an amenable number.

331452421 is a deficient number, since it is larger than the sum of its proper divisors (1).

331452421 is an equidigital number, since it uses as much as digits as its factorization.

331452421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 25.

The square root of 331452421 is about 18205.8348064570. The cubic root of 331452421 is about 692.0546618643.

The spelling of 331452421 in words is "three hundred thirty-one million, four hundred fifty-two thousand, four hundred twenty-one".