51940648 has 8 divisors (see below), whose sum is σ = 97388730. Its totient is φ = 25970320.

The previous prime is 51940639. The next prime is 51940657. The reversal of 51940648 is 84604915.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51940639) and next prime (51940657).

It can be written as a sum of positive squares in only one way, i.e., 48413764 + 3526884 = 6958^2 + 1878^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×51940648³ (a number of 24 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3246283 + ... + 3246298.

Almost surely, 2^51940648 is an apocalyptic number.

It is an amenable number.

51940648 is a deficient number, since it is larger than the sum of its proper divisors (45448082).

51940648 is a wasteful number, since it uses less digits than its factorization.

51940648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6492587 (or 6492583 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 51940648 is about 7206.9860552106. The cubic root of 51940648 is about 373.1090539253.

The spelling of 51940648 in words is "fifty-one million, nine hundred forty thousand, six hundred forty-eight".