331378425 has 144 divisors (see below), whose sum is σ = 727721280. Its totient is φ = 147329280.

The previous prime is 331378387. The next prime is 331378429. The reversal of 331378425 is 524873133.

It is not a de Polignac number, because 331378425 - 2⁶ = 331378361 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 331378425.

It is not an unprimeable number, because it can be changed into a prime (331378429) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1422109 + ... + 1422341.

It is an arithmetic number, because the mean of its divisors is an integer number (5053620).

Almost surely, 2^331378425 is an apocalyptic number.

331378425 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

331378425 is an abundant number, since it is smaller than the sum of its proper divisors (396342855).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

331378425 is a wasteful number, since it uses less digits than its factorization.

331378425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309 (or 291 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 331378425 is about 18203.8024873926. The cubic root of 331378425 is about 692.0031581544.

The spelling of 331378425 in words is "three hundred thirty-one million, three hundred seventy-eight thousand, four hundred twenty-five".