51036457 has 4 divisors (see below), whose sum is σ = 51077520. Its totient is φ = 50995396.

The previous prime is 51036437. The next prime is 51036463. The reversal of 51036457 is 75463015.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75463015 = 5 ⋅15092603.

It is a cyclic number.

It is not a de Polignac number, because 51036457 - 2¹¹ = 51034409 is a prime.

It is a super-2 number, since 2×51036457² = 5209439886225698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51036437) 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, 18607 + ... + 21172.

It is an arithmetic number, because the mean of its divisors is an integer number (12769380).

Almost surely, 2^51036457 is an apocalyptic number.

It is an amenable number.

51036457 is a deficient number, since it is larger than the sum of its proper divisors (41063).

51036457 is a wasteful number, since it uses less digits than its factorization.

51036457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41062.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 51036457 is about 7143.9804730976. The cubic root of 51036457 is about 370.9313207317.

The spelling of 51036457 in words is "fifty-one million, thirty-six thousand, four hundred fifty-seven".