251401531433342 has 16 divisors (see below), whose sum is σ = 381860785717632. Its totient is φ = 124121636843160.

The previous prime is 251401531433303. The next prime is 251401531433363. The reversal of 251401531433342 is 243334135104152.

It is a super-3 number, since 3×251401531433342³ (a number of 44 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 251401531433342.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1758423884 + ... + 1758566847.

It is an arithmetic number, because the mean of its divisors is an integer number (23866299107352).

Almost surely, 2^{251401531433342} is an apocalyptic number.

251401531433342 is a deficient number, since it is larger than the sum of its proper divisors (130459254284290).

251401531433342 is a wasteful number, since it uses less digits than its factorization.

251401531433342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3516991183.

The product of its (nonzero) digits is 518400, while the sum is 41.

Adding to 251401531433342 its reverse (243334135104152), we get a palindrome (494735666537494).

The spelling of 251401531433342 in words is "two hundred fifty-one trillion, four hundred one billion, five hundred thirty-one million, four hundred thirty-three thousand, three hundred forty-two".