51102047 has 4 divisors (see below), whose sum is σ = 51164520. Its totient is φ = 51039576.

The previous prime is 51101989. The next prime is 51102049. The reversal of 51102047 is 74020115.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51102047 - 2¹⁰ = 51101023 is a prime.

It is a super-2 number, since 2×51102047² = 5222838415180418, 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 (51102049) 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, 29993 + ... + 31650.

It is an arithmetic number, because the mean of its divisors is an integer number (12791130).

Almost surely, 2^51102047 is an apocalyptic number.

51102047 is a deficient number, since it is larger than the sum of its proper divisors (62473).

51102047 is an equidigital number, since it uses as much as digits as its factorization.

51102047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62472.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 51102047 is about 7148.5695771951. The cubic root of 51102047 is about 371.0901547091.

The spelling of 51102047 in words is "fifty-one million, one hundred two thousand, forty-seven".