51890551 has 8 divisors (see below), whose sum is σ = 54101520. Its totient is φ = 49725312.

The previous prime is 51890519. The next prime is 51890557. The reversal of 51890551 is 15509815.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51890551 - 2⁵ = 51890519 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 (51890557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9106 + ... + 13663.

It is an arithmetic number, because the mean of its divisors is an integer number (6762690).

Almost surely, 2^51890551 is an apocalyptic number.

51890551 is a deficient number, since it is larger than the sum of its proper divisors (2210969).

51890551 is a wasteful number, since it uses less digits than its factorization.

51890551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22865.

The product of its (nonzero) digits is 9000, while the sum is 34.

The square root of 51890551 is about 7203.5096307286. The cubic root of 51890551 is about 372.9890601913.

It can be divided in two parts, 51890 and 551, that added together give a square (52441 = 229²).

The spelling of 51890551 in words is "fifty-one million, eight hundred ninety thousand, five hundred fifty-one".