1251540233153 has 32 divisors (see below), whose sum is σ = 1548871372800. Its totient is φ = 987404148864.

The previous prime is 1251540233149. The next prime is 1251540233219. The reversal of 1251540233153 is 3513320451521.

It is a happy number.

It is not a de Polignac number, because 1251540233153 - 2² = 1251540233149 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1251540233113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125678 + ... + 1587096.

It is an arithmetic number, because the mean of its divisors is an integer number (48402230400).

Almost surely, 2^{1251540233153} is an apocalyptic number.

It is an amenable number.

1251540233153 is a deficient number, since it is larger than the sum of its proper divisors (297331139647).

1251540233153 is a wasteful number, since it uses less digits than its factorization.

1251540233153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461629.

The product of its (nonzero) digits is 54000, while the sum is 35.

Adding to 1251540233153 its reverse (3513320451521), we get a palindrome (4764860684674).

The spelling of 1251540233153 in words is "one trillion, two hundred fifty-one billion, five hundred forty million, two hundred thirty-three thousand, one hundred fifty-three".