7131921501 has 4 divisors (see below), whose sum is σ = 9509228672. Its totient is φ = 4754614332.

The previous prime is 7131921487. The next prime is 7131921607. The reversal of 7131921501 is 1051291317.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1051291317 = 3 ⋅350430439.

It is not a de Polignac number, because 7131921501 - 2¹⁵ = 7131888733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7131921701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1188653581 + ... + 1188653586.

It is an arithmetic number, because the mean of its divisors is an integer number (2377307168).

Almost surely, 2^7131921501 is an apocalyptic number.

It is an amenable number.

7131921501 is a deficient number, since it is larger than the sum of its proper divisors (2377307171).

7131921501 is a wasteful number, since it uses less digits than its factorization.

7131921501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2377307170.

The product of its (nonzero) digits is 1890, while the sum is 30.

The square root of 7131921501 is about 84450.7045618922. The cubic root of 7131921501 is about 1924.8734611599.

The spelling of 7131921501 in words is "seven billion, one hundred thirty-one million, nine hundred twenty-one thousand, five hundred one".