51150691 has 2 divisors, whose sum is σ = 51150692. Its totient is φ = 51150690.

The previous prime is 51150677. The next prime is 51150709. The reversal of 51150691 is 19605115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51150691 - 2¹³ = 51142499 is a prime.

It is not a weakly prime, because it can be changed into another prime (51150661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25575345 + 25575346.

It is an arithmetic number, because the mean of its divisors is an integer number (25575346).

Almost surely, 2^51150691 is an apocalyptic number.

51150691 is a deficient number, since it is larger than the sum of its proper divisors (1).

51150691 is an equidigital number, since it uses as much as digits as its factorization.

51150691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350, while the sum is 28.

The square root of 51150691 is about 7151.9711268992. The cubic root of 51150691 is about 371.2078641806.

The spelling of 51150691 in words is "fifty-one million, one hundred fifty thousand, six hundred ninety-one".