1331225678 has 16 divisors (see below), whose sum is σ = 2016334320. Its totient is φ = 659145600.

The previous prime is 1331225677. The next prime is 1331225683. The reversal of 1331225678 is 8765221331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331225677) 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, 79613 + ... + 94871.

It is an arithmetic number, because the mean of its divisors is an integer number (126020895).

Almost surely, 2^1331225678 is an apocalyptic number.

1331225678 is a deficient number, since it is larger than the sum of its proper divisors (685108642).

1331225678 is a wasteful number, since it uses less digits than its factorization.

1331225678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15683.

The product of its digits is 60480, while the sum is 38.

The square root of 1331225678 is about 36485.9654935977. The cubic root of 1331225678 is about 1100.0621667345.

The spelling of 1331225678 in words is "one billion, three hundred thirty-one million, two hundred twenty-five thousand, six hundred seventy-eight".