51013537 has 4 divisors (see below), whose sum is σ = 53698480. Its totient is φ = 48328596.

The previous prime is 51013519. The next prime is 51013597. The reversal of 51013537 is 73531015.

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.

It is a cyclic number.

It is not a de Polignac number, because 51013537 - 2⁷ = 51013409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51013597) 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, 1342443 + ... + 1342480.

It is an arithmetic number, because the mean of its divisors is an integer number (13424620).

Almost surely, 2^51013537 is an apocalyptic number.

It is an amenable number.

51013537 is a deficient number, since it is larger than the sum of its proper divisors (2684943).

51013537 is a wasteful number, since it uses less digits than its factorization.

51013537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2684942.

The product of its (nonzero) digits is 1575, while the sum is 25.

The square root of 51013537 is about 7142.3761452335. The cubic root of 51013537 is about 370.8757851441.

The spelling of 51013537 in words is "fifty-one million, thirteen thousand, five hundred thirty-seven".