51370091 has 16 divisors (see below), whose sum is σ = 55641600. Its totient is φ = 47275488.

The previous prime is 51370051. The next prime is 51370093. The reversal of 51370091 is 19007315.

It is a cyclic number.

It is not a de Polignac number, because 51370091 - 2¹⁴ = 51353707 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 51370091.

It is not an unprimeable number, because it can be changed into a prime (51370093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139790 + ... + 140156.

It is an arithmetic number, because the mean of its divisors is an integer number (3477600).

Almost surely, 2^51370091 is an apocalyptic number.

51370091 is a deficient number, since it is larger than the sum of its proper divisors (4271509).

51370091 is a wasteful number, since it uses less digits than its factorization.

51370091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578.

The product of its (nonzero) digits is 945, while the sum is 26.

The square root of 51370091 is about 7167.2931431608. The cubic root of 51370091 is about 371.7378461897.

The spelling of 51370091 in words is "fifty-one million, three hundred seventy thousand, ninety-one".