51654779 has 12 divisors (see below), whose sum is σ = 57106248. Its totient is φ = 46720520.

The previous prime is 51654761. The next prime is 51654797. The reversal of 51654779 is 97745615.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is an interprime number because it is at equal distance from previous prime (51654761) and next prime (51654797).

It is not a de Polignac number, because 51654779 - 2⁸ = 51654523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51654709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 262109 + ... + 262305.

It is an arithmetic number, because the mean of its divisors is an integer number (4758854).

Almost surely, 2^51654779 is an apocalyptic number.

51654779 is a deficient number, since it is larger than the sum of its proper divisors (5451469).

51654779 is an frugal number, since it uses more digits than its factorization.

51654779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427 (or 208 counting only the distinct ones).

The product of its digits is 264600, while the sum is 44.

The square root of 51654779 is about 7187.1259207002. The cubic root of 51654779 is about 372.4232930652.

Multiplying 51654779 by its sum of digits (44), we get a square (2272810276 = 47674²).

The spelling of 51654779 in words is "fifty-one million, six hundred fifty-four thousand, seven hundred seventy-nine".