51252091 has 12 divisors (see below), whose sum is σ = 57714552. Its totient is φ = 45452000.

The previous prime is 51252031. The next prime is 51252107. The reversal of 51252091 is 19025215.

It is not a de Polignac number, because 51252091 - 2¹⁵ = 51219323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51252031) 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, 205 + ... + 10126.

It is an arithmetic number, because the mean of its divisors is an integer number (4809546).

Almost surely, 2^51252091 is an apocalyptic number.

51252091 is a deficient number, since it is larger than the sum of its proper divisors (6462461).

51252091 is a wasteful number, since it uses less digits than its factorization.

51252091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10394 (or 10383 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 51252091 is about 7159.0565719234. The cubic root of 51252091 is about 371.4529936956.

The spelling of 51252091 in words is "fifty-one million, two hundred fifty-two thousand, ninety-one".