1351965481 has 4 divisors (see below), whose sum is σ = 1380730752. Its totient is φ = 1323200212.

The previous prime is 1351965449. The next prime is 1351965551. The reversal of 1351965481 is 1845691531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1351965481 - 2⁵ = 1351965449 is a prime.

It is a super-2 number, since 2×1351965481² = 3655621323631122722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1351965421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14382565 + ... + 14382658.

It is an arithmetic number, because the mean of its divisors is an integer number (345182688).

Almost surely, 2^1351965481 is an apocalyptic number.

It is an amenable number.

1351965481 is a deficient number, since it is larger than the sum of its proper divisors (28765271).

1351965481 is an equidigital number, since it uses as much as digits as its factorization.

1351965481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28765270.

The product of its digits is 129600, while the sum is 43.

The square root of 1351965481 is about 36769.0832221855. The cubic root of 1351965481 is about 1105.7455520158.

The spelling of 1351965481 in words is "one billion, three hundred fifty-one million, nine hundred sixty-five thousand, four hundred eighty-one".