51779706 has 16 divisors (see below), whose sum is σ = 112974048. Its totient is φ = 15690800.

The previous prime is 51779701. The next prime is 51779711. The reversal of 51779706 is 60797715.

It is an interprime number because it is at equal distance from previous prime (51779701) and next prime (51779711).

It is a super-2 number, since 2×51779706² = 5362275906892872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51779701) 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, 392205 + ... + 392336.

It is an arithmetic number, because the mean of its divisors is an integer number (7060878).

Almost surely, 2^51779706 is an apocalyptic number.

51779706 is an abundant number, since it is smaller than the sum of its proper divisors (61194342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51779706 is a wasteful number, since it uses less digits than its factorization.

51779706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784557.

The product of its (nonzero) digits is 92610, while the sum is 42.

The square root of 51779706 is about 7195.8116984813. The cubic root of 51779706 is about 372.7232863958.

Subtracting 51779706 from its reverse (60797715), we obtain a square (9018009 = 3003²).

The spelling of 51779706 in words is "fifty-one million, seven hundred seventy-nine thousand, seven hundred six".