951328261 has 4 divisors (see below), whose sum is σ = 1024507372. Its totient is φ = 878149152.

The previous prime is 951328249. The next prime is 951328297. The reversal of 951328261 is 162823159.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 162823159 = 457 ⋅356287.

It can be written as a sum of positive squares in 2 ways, for example, as 44957025 + 906371236 = 6705^2 + 30106^2 .

It is a cyclic number.

It is not a de Polignac number, because 951328261 - 2⁹ = 951327749 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 951328261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (951328241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36589536 + ... + 36589561.

It is an arithmetic number, because the mean of its divisors is an integer number (256126843).

Almost surely, 2^951328261 is an apocalyptic number.

It is an amenable number.

951328261 is a deficient number, since it is larger than the sum of its proper divisors (73179111).

951328261 is a wasteful number, since it uses less digits than its factorization.

951328261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73179110.

The product of its digits is 25920, while the sum is 37.

The square root of 951328261 is about 30843.6097271380. The cubic root of 951328261 is about 983.5055148332.

The spelling of 951328261 in words is "nine hundred fifty-one million, three hundred twenty-eight thousand, two hundred sixty-one".