51692091 has 8 divisors (see below), whose sum is σ = 75188544. Its totient is φ = 31328520.

The previous prime is 51692089. The next prime is 51692099. The reversal of 51692091 is 19029615.

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

It is not a de Polignac number, because 51692091 - 2¹ = 51692089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 1566427 = 51692091 / (5 + 1 + 6 + 9 + 2 + 0 + 9 + 1).

It is not an unprimeable number, because it can be changed into a prime (51692099) 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, 783181 + ... + 783246.

It is an arithmetic number, because the mean of its divisors is an integer number (9398568).

Almost surely, 2^51692091 is an apocalyptic number.

51692091 is a deficient number, since it is larger than the sum of its proper divisors (23496453).

51692091 is a wasteful number, since it uses less digits than its factorization.

51692091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1566441.

The product of its (nonzero) digits is 4860, while the sum is 33.

The square root of 51692091 is about 7189.7212046087. The cubic root of 51692091 is about 372.5129428111.

It can be divided in two parts, 5169 and 2091, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 51692091 in words is "fifty-one million, six hundred ninety-two thousand, ninety-one".