1251400230331 has 4 divisors (see below), whose sum is σ = 1251402888832. Its totient is φ = 1251397571832.

The previous prime is 1251400230307. The next prime is 1251400230337. The reversal of 1251400230331 is 1330320041521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1251400230331 - 2¹¹ = 1251400228283 is a prime.

It is a super-2 number, since 2×1251400230331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1251400230296 and 1251400230305.

It is not an unprimeable number, because it can be changed into a prime (1251400230337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 412356 + ... + 1634881.

It is an arithmetic number, because the mean of its divisors is an integer number (312850722208).

Almost surely, 2^{1251400230331} is an apocalyptic number.

1251400230331 is a deficient number, since it is larger than the sum of its proper divisors (2658501).

1251400230331 is an equidigital number, since it uses as much as digits as its factorization.

1251400230331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2658500.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 1251400230331 its reverse (1330320041521), we get a palindrome (2581720271852).

The spelling of 1251400230331 in words is "one trillion, two hundred fifty-one billion, four hundred million, two hundred thirty thousand, three hundred thirty-one".