5431962721 has 4 divisors (see below), whose sum is σ = 5492996100. Its totient is φ = 5370929344.

The previous prime is 5431962719. The next prime is 5431962727. The reversal of 5431962721 is 1272691345.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1483097121 + 3948865600 = 38511^2 + 62840^2 .

It is a cyclic number.

It is not a de Polignac number, because 5431962721 - 2¹ = 5431962719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5431962727) 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, 30516556 + ... + 30516733.

It is an arithmetic number, because the mean of its divisors is an integer number (1373249025).

Almost surely, 2^5431962721 is an apocalyptic number.

It is an amenable number.

5431962721 is a deficient number, since it is larger than the sum of its proper divisors (61033379).

5431962721 is an equidigital number, since it uses as much as digits as its factorization.

5431962721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61033378.

The product of its digits is 90720, while the sum is 40.

The square root of 5431962721 is about 73701.8501870882. The cubic root of 5431962721 is about 1757.8653011028.

The spelling of 5431962721 in words is "five billion, four hundred thirty-one million, nine hundred sixty-two thousand, seven hundred twenty-one".