51241995 has 72 divisors (see below), whose sum is σ = 109478304. Its totient is φ = 22030848.

The previous prime is 51241991. The next prime is 51242027. The reversal of 51241995 is 59914215.

It is not a de Polignac number, because 51241995 - 2² = 51241991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51241991) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 36802 + ... + 38168.

It is an arithmetic number, because the mean of its divisors is an integer number (1520532).

Almost surely, 2^51241995 is an apocalyptic number.

51241995 is an abundant number, since it is smaller than the sum of its proper divisors (58236309).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51241995 is a wasteful number, since it uses less digits than its factorization.

51241995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1409 (or 1399 counting only the distinct ones).

The product of its digits is 16200, while the sum is 36.

The square root of 51241995 is about 7158.3514163528. The cubic root of 51241995 is about 371.4286016131.

The spelling of 51241995 in words is "fifty-one million, two hundred forty-one thousand, nine hundred ninety-five".