51159090 has 16 divisors (see below), whose sum is σ = 122781888. Its totient is φ = 13642416.

The previous prime is 51159079. The next prime is 51159113. The reversal of 51159090 is 9095115.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 1705303 = 51159090 / (5 + 1 + 1 + 5 + 9 + 0 + 9 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 852622 + ... + 852681.

It is an arithmetic number, because the mean of its divisors is an integer number (7673868).

Almost surely, 2^51159090 is an apocalyptic number.

51159090 is an abundant number, since it is smaller than the sum of its proper divisors (71622798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51159090 is a wasteful number, since it uses less digits than its factorization.

51159090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1705313.

The product of its (nonzero) digits is 2025, while the sum is 30.

The square root of 51159090 is about 7152.5582835794. The cubic root of 51159090 is about 371.2281806492.

The spelling of 51159090 in words is "fifty-one million, one hundred fifty-nine thousand, ninety".