51091359 has 32 divisors (see below), whose sum is σ = 77552640. Its totient is φ = 29635200.

The previous prime is 51091357. The next prime is 51091393. The reversal of 51091359 is 95319015.

It is not a de Polignac number, because 51091359 - 2¹ = 51091357 is a prime.

It is a super-2 number, since 2×51091359² = 5220653928933762, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51091357) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 188394 + ... + 188664.

It is an arithmetic number, because the mean of its divisors is an integer number (2423520).

Almost surely, 2^51091359 is an apocalyptic number.

51091359 is a deficient number, since it is larger than the sum of its proper divisors (26461281).

51091359 is a wasteful number, since it uses less digits than its factorization.

51091359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511.

The product of its (nonzero) digits is 6075, while the sum is 33.

The square root of 51091359 is about 7147.8219759588. The cubic root of 51091359 is about 371.0642817200.

The spelling of 51091359 in words is "fifty-one million, ninety-one thousand, three hundred fifty-nine".