251226210142 has 8 divisors (see below), whose sum is σ = 380361178296. Its totient is φ = 124439150712.

The previous prime is 251226210097. The next prime is 251226210163. The reversal of 251226210142 is 241012622152.

It is a happy number.

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

It is a super-2 number, since 2×251226210142² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 251226210142.

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, 586976913 + ... + 586977340.

It is an arithmetic number, because the mean of its divisors is an integer number (47545147287).

Almost surely, 2^251226210142 is an apocalyptic number.

251226210142 is a deficient number, since it is larger than the sum of its proper divisors (129134968154).

251226210142 is a wasteful number, since it uses less digits than its factorization.

251226210142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173954362.

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 251226210142 its reverse (241012622152), we get a palindrome (492238832294).

The spelling of 251226210142 in words is "two hundred fifty-one billion, two hundred twenty-six million, two hundred ten thousand, one hundred forty-two".