51946551 has 12 divisors (see below), whose sum is σ = 78983320. Its totient is φ = 32808240.

The previous prime is 51946523. The next prime is 51946553. The reversal of 51946551 is 15564915.

It is not a de Polignac number, because 51946551 - 2⁶ = 51946487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51946553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 151720 + ... + 152061.

Almost surely, 2^51946551 is an apocalyptic number.

51946551 is a deficient number, since it is larger than the sum of its proper divisors (27036769).

51946551 is a wasteful number, since it uses less digits than its factorization.

51946551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303806 (or 303803 counting only the distinct ones).

The product of its digits is 27000, while the sum is 36.

The square root of 51946551 is about 7207.3955767670. The cubic root of 51946551 is about 373.1231878737.

The spelling of 51946551 in words is "fifty-one million, nine hundred forty-six thousand, five hundred fifty-one".