51929791 has 16 divisors (see below), whose sum is σ = 55560384. Its totient is φ = 48432384.

The previous prime is 51929753. The next prime is 51929797. The reversal of 51929791 is 19792915.

It is a cyclic number.

It is not a de Polignac number, because 51929791 - 2⁹ = 51929279 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 (51929797) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263505 + ... + 263701.

It is an arithmetic number, because the mean of its divisors is an integer number (3472524).

Almost surely, 2^51929791 is an apocalyptic number.

51929791 is a deficient number, since it is larger than the sum of its proper divisors (3630593).

51929791 is a wasteful number, since it uses less digits than its factorization.

51929791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450.

The product of its digits is 51030, while the sum is 43.

The square root of 51929791 is about 7206.2327883576. The cubic root of 51929791 is about 373.0830554865.

The spelling of 51929791 in words is "fifty-one million, nine hundred twenty-nine thousand, seven hundred ninety-one".