51902419 has 4 divisors (see below), whose sum is σ = 53109496. Its totient is φ = 50695344.

The previous prime is 51902393. The next prime is 51902437. The reversal of 51902419 is 91420915.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51902419 - 2⁵ = 51902387 is a prime.

It is a super-2 number, since 2×51902419² = 5387722196103122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51902449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 603474 + ... + 603559.

It is an arithmetic number, because the mean of its divisors is an integer number (13277374).

Almost surely, 2^51902419 is an apocalyptic number.

51902419 is a deficient number, since it is larger than the sum of its proper divisors (1207077).

51902419 is a wasteful number, since it uses less digits than its factorization.

51902419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207076.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 51902419 is about 7204.3333487561. Note that the first 4 decimals coincide. The cubic root of 51902419 is about 373.0174937349.

The spelling of 51902419 in words is "fifty-one million, nine hundred two thousand, four hundred nineteen".