51094591 has 4 divisors (see below), whose sum is σ = 53783800. Its totient is φ = 48405384.

The previous prime is 51094583. The next prime is 51094609. The reversal of 51094591 is 19549015.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19549015 = 5 ⋅3909803.

It is a cyclic number.

It is not a de Polignac number, because 51094591 - 2³ = 51094583 is a prime.

It is a super-2 number, since 2×51094591² = 5221314458914562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51094091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1344576 + ... + 1344613.

It is an arithmetic number, because the mean of its divisors is an integer number (13445950).

Almost surely, 2^51094591 is an apocalyptic number.

51094591 is a deficient number, since it is larger than the sum of its proper divisors (2689209).

51094591 is a wasteful number, since it uses less digits than its factorization.

51094591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2689208.

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 51094591 is about 7148.0480552386. The cubic root of 51094591 is about 371.0721059685.

The spelling of 51094591 in words is "fifty-one million, ninety-four thousand, five hundred ninety-one".