51990441 has 16 divisors (see below), whose sum is σ = 75325440. Its totient is φ = 31775760.

The previous prime is 51990431. The next prime is 51990461. The reversal of 51990441 is 14409915.

It is not a de Polignac number, because 51990441 - 2⁵ = 51990409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51990401) 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, 12945 + ... + 16478.

It is an arithmetic number, because the mean of its divisors is an integer number (4707840).

Almost surely, 2^51990441 is an apocalyptic number.

It is an amenable number.

51990441 is a deficient number, since it is larger than the sum of its proper divisors (23334999).

51990441 is a wasteful number, since it uses less digits than its factorization.

51990441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29476.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 51990441 is about 7210.4397230682. The cubic root of 51990441 is about 373.2282430788.

The spelling of 51990441 in words is "fifty-one million, nine hundred ninety thousand, four hundred forty-one".