1231967016 has 384 divisors, whose sum is σ = 4343673600. Its totient is φ = 321269760.

The previous prime is 1231966969. The next prime is 1231967021. The reversal of 1231967016 is 6107691321.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7376965 + ... + 7377131.

It is an arithmetic number, because the mean of its divisors is an integer number (11311650).

Almost surely, 2^1231967016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231967016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2171836800).

1231967016 is an abundant number, since it is smaller than the sum of its proper divisors (3111706584).

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

1231967016 is a wasteful number, since it uses less digits than its factorization.

1231967016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 1231967016 is about 35099.3876869668. The cubic root of 1231967016 is about 1072.0121151263.

The spelling of 1231967016 in words is "one billion, two hundred thirty-one million, nine hundred sixty-seven thousand, sixteen".