51957198 has 12 divisors (see below), whose sum is σ = 112573968. Its totient is φ = 17319060.

The previous prime is 51957197. The next prime is 51957203. The reversal of 51957198 is 89175915.

It is a super-2 number, since 2×51957198² = 5399100848022408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51957197) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1443238 + ... + 1443273.

It is an arithmetic number, because the mean of its divisors is an integer number (9381164).

Almost surely, 2^51957198 is an apocalyptic number.

51957198 is an abundant number, since it is smaller than the sum of its proper divisors (60616770).

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

51957198 is a wasteful number, since it uses less digits than its factorization.

51957198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2886519 (or 2886516 counting only the distinct ones).

The product of its digits is 113400, while the sum is 45.

The square root of 51957198 is about 7208.1341552443. The cubic root of 51957198 is about 373.1486779920.

The spelling of 51957198 in words is "fifty-one million, nine hundred fifty-seven thousand, one hundred ninety-eight".