51406025 has 24 divisors (see below), whose sum is σ = 70870464. Its totient is φ = 36670400.

The previous prime is 51406021. The next prime is 51406037. The reversal of 51406025 is 52060415.

It is not a de Polignac number, because 51406025 - 2² = 51406021 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51406021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12812 + ... + 16338.

It is an arithmetic number, because the mean of its divisors is an integer number (2952936).

Almost surely, 2^51406025 is an apocalyptic number.

51406025 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51406025 is a deficient number, since it is larger than the sum of its proper divisors (19464439).

51406025 is a wasteful number, since it uses less digits than its factorization.

51406025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3601 (or 3596 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 51406025 is about 7169.7995090518. The cubic root of 51406025 is about 371.8245043599.

The spelling of 51406025 in words is "fifty-one million, four hundred six thousand, twenty-five".