51981154 has 8 divisors (see below), whose sum is σ = 79630848. Its totient is φ = 25437540.

The previous prime is 51981151. The next prime is 51981191. The reversal of 51981154 is 45118915.

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

It is not an unprimeable number, because it can be changed into a prime (51981151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276402 + ... + 276589.

It is an arithmetic number, because the mean of its divisors is an integer number (9953856).

Almost surely, 2^51981154 is an apocalyptic number.

51981154 is a deficient number, since it is larger than the sum of its proper divisors (27649694).

51981154 is a wasteful number, since it uses less digits than its factorization.

51981154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553040.

The product of its digits is 7200, while the sum is 34.

The square root of 51981154 is about 7209.7956975215. The cubic root of 51981154 is about 373.2060186273.

The spelling of 51981154 in words is "fifty-one million, nine hundred eighty-one thousand, one hundred fifty-four".