51902417 has 10 divisors (see below), whose sum is σ = 60552018. Its totient is φ = 44485728.

The previous prime is 51902393. The next prime is 51902437. The reversal of 51902417 is 71420915.

It can be written as a sum of positive squares in only one way, i.e., 36917776 + 14984641 = 6076^2 + 3871^2 .

It is not a de Polignac number, because 51902417 - 2¹⁰ = 51901393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51902417.

It is not an unprimeable number, because it can be changed into a prime (51902437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8408 + ... + 13209.

Almost surely, 2^51902417 is an apocalyptic number.

It is an amenable number.

51902417 is a deficient number, since it is larger than the sum of its proper divisors (8649601).

51902417 is an frugal number, since it uses more digits than its factorization.

51902417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21645 (or 21624 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 51902417 is about 7204.3332099508. Note that the first 3 decimals coincide. The cubic root of 51902417 is about 373.0174889437.

The spelling of 51902417 in words is "fifty-one million, nine hundred two thousand, four hundred seventeen".