51979246 has 32 divisors (see below), whose sum is σ = 87026400. Its totient is φ = 23088000.

The previous prime is 51979243. The next prime is 51979283. The reversal of 51979246 is 64297915.

It is a happy number.

Its product of digits (136080) is a multiple of the sum of its prime divisors (420).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51979243) 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, 331000 + ... + 331156.

It is an arithmetic number, because the mean of its divisors is an integer number (2719575).

Almost surely, 2^51979246 is an apocalyptic number.

51979246 is a deficient number, since it is larger than the sum of its proper divisors (35047154).

51979246 is a wasteful number, since it uses less digits than its factorization.

51979246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420.

The product of its digits is 136080, while the sum is 43.

The square root of 51979246 is about 7209.6633763304. The cubic root of 51979246 is about 373.2014523198.

It can be divided in two parts, 51979 and 246, that added together give a palindrome (52225).

The spelling of 51979246 in words is "fifty-one million, nine hundred seventy-nine thousand, two hundred forty-six".