51154380 has 36 divisors (see below), whose sum is σ = 155168832. Its totient is φ = 13641120.

The previous prime is 51154349. The next prime is 51154409. The reversal of 51154380 is 8345115.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141916 + ... + 142275.

Almost surely, 2^51154380 is an apocalyptic number.

It is an amenable number.

51154380 is an abundant number, since it is smaller than the sum of its proper divisors (104014452).

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

51154380 is a wasteful number, since it uses less digits than its factorization.

51154380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284206 (or 284201 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 51154380 is about 7152.2290231787. The cubic root of 51154380 is about 371.2167878326.

Adding to 51154380 its reverse (8345115), we get a palindrome (59499495).

The spelling of 51154380 in words is "fifty-one million, one hundred fifty-four thousand, three hundred eighty".