51903645151 has 4 divisors (see below), whose sum is σ = 51904729152. Its totient is φ = 51902561152.

The previous prime is 51903645107. The next prime is 51903645187. The reversal of 51903645151 is 15154630915.

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 51903645151 - 2¹³ = 51903636959 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51903649151) 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, 466690 + ... + 567103.

It is an arithmetic number, because the mean of its divisors is an integer number (12976182288).

Almost surely, 2^51903645151 is an apocalyptic number.

51903645151 is a deficient number, since it is larger than the sum of its proper divisors (1084001).

51903645151 is a wasteful number, since it uses less digits than its factorization.

51903645151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084000.

The product of its (nonzero) digits is 81000, while the sum is 40.

The spelling of 51903645151 in words is "fifty-one billion, nine hundred three million, six hundred forty-five thousand, one hundred fifty-one".