51436501 has 4 divisors (see below), whose sum is σ = 51744672. Its totient is φ = 51128332.

The previous prime is 51436493. The next prime is 51436507. The reversal of 51436501 is 10563415.

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: 10563415 = 5 ⋅2112683.

It is a cyclic number.

It is not a de Polignac number, because 51436501 - 2³ = 51436493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51436507) 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, 153835 + ... + 154168.

It is an arithmetic number, because the mean of its divisors is an integer number (12936168).

Almost surely, 2^51436501 is an apocalyptic number.

It is an amenable number.

51436501 is a deficient number, since it is larger than the sum of its proper divisors (308171).

51436501 is a wasteful number, since it uses less digits than its factorization.

51436501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308170.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 51436501 is about 7171.9244976505. The cubic root of 51436501 is about 371.8979684140.

Adding to 51436501 its reverse (10563415), we get a palindrome (61999916).

The spelling of 51436501 in words is "fifty-one million, four hundred thirty-six thousand, five hundred one".