51906149 has 8 divisors (see below), whose sum is σ = 52550400. Its totient is φ = 51266016.

The previous prime is 51906137. The next prime is 51906161. The reversal of 51906149 is 94160915.

It is an interprime number because it is at equal distance from previous prime (51906137) and next prime (51906161).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51906149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51903149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29702 + ... + 31400.

It is an arithmetic number, because the mean of its divisors is an integer number (6568800).

Almost surely, 2^51906149 is an apocalyptic number.

It is an amenable number.

51906149 is a deficient number, since it is larger than the sum of its proper divisors (644251).

51906149 is a wasteful number, since it uses less digits than its factorization.

51906149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2059.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 51906149 is about 7204.5922160800. The cubic root of 51906149 is about 373.0264292332.

The spelling of 51906149 in words is "fifty-one million, nine hundred six thousand, one hundred forty-nine".