51900469 has 4 divisors (see below), whose sum is σ = 52057600. Its totient is φ = 51743340.

The previous prime is 51900467. The next prime is 51900521. The reversal of 51900469 is 96400915.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51900469 - 2¹ = 51900467 is a prime.

It is a super-2 number, since 2×51900469² = 5387317364839922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51900463) 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, 78069 + ... + 78730.

It is an arithmetic number, because the mean of its divisors is an integer number (13014400).

Almost surely, 2^51900469 is an apocalyptic number.

It is an amenable number.

51900469 is a deficient number, since it is larger than the sum of its proper divisors (157131).

51900469 is a wasteful number, since it uses less digits than its factorization.

51900469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157130.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 51900469 is about 7204.1980122703. The cubic root of 51900469 is about 373.0128221915.

The spelling of 51900469 in words is "fifty-one million, nine hundred thousand, four hundred sixty-nine".