251940134 has 8 divisors (see below), whose sum is σ = 378470448. Its totient is φ = 125783320.

The previous prime is 251940103. The next prime is 251940151. The reversal of 251940134 is 431049152.

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

It is a super-2 number, since 2×251940134² = 126947662239875912, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 251940097 and 251940106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91682 + ... + 94389.

It is an arithmetic number, because the mean of its divisors is an integer number (47308806).

Almost surely, 2^251940134 is an apocalyptic number.

251940134 is a deficient number, since it is larger than the sum of its proper divisors (126530314).

251940134 is a wasteful number, since it uses less digits than its factorization.

251940134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186750.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 251940134 is about 15872.6221526249. The cubic root of 251940134 is about 631.5859379229.

Adding to 251940134 its reverse (431049152), we get a palindrome (682989286).

The spelling of 251940134 in words is "two hundred fifty-one million, nine hundred forty thousand, one hundred thirty-four".