251040104 has 32 divisors (see below), whose sum is σ = 538910400. Its totient is φ = 107395200.

The previous prime is 251040091. The next prime is 251040109. The reversal of 251040104 is 401040152.

It is a super-2 number, since 2×251040104² = 126042267632661632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (251040109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29927 + ... + 37385.

It is an arithmetic number, because the mean of its divisors is an integer number (16840950).

Almost surely, 2^251040104 is an apocalyptic number.

It is an amenable number.

251040104 is an abundant number, since it is smaller than the sum of its proper divisors (287870296).

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

251040104 is a wasteful number, since it uses less digits than its factorization.

251040104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8073 (or 8069 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 251040104 is about 15844.2451382197. The cubic root of 251040104 is about 630.8329487974.

Adding to 251040104 its reverse (401040152), we get a palindrome (652080256).

The spelling of 251040104 in words is "two hundred fifty-one million, forty thousand, one hundred four".