1351981912 has 32 divisors (see below), whose sum is σ = 2570443200. Its totient is φ = 666572544.

The previous prime is 1351981909. The next prime is 1351981913. The reversal of 1351981912 is 2191891531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1351981913) 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, 280273 + ... + 285055.

It is an arithmetic number, because the mean of its divisors is an integer number (80326350).

Almost surely, 2^1351981912 is an apocalyptic number.

It is an amenable number.

1351981912 is a deficient number, since it is larger than the sum of its proper divisors (1218461288).

1351981912 is a wasteful number, since it uses less digits than its factorization.

1351981912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5275 (or 5271 counting only the distinct ones).

The product of its digits is 19440, while the sum is 40.

The square root of 1351981912 is about 36769.3066565036. The cubic root of 1351981912 is about 1105.7500315265.

The spelling of 1351981912 in words is "one billion, three hundred fifty-one million, nine hundred eighty-one thousand, nine hundred twelve".