251231545253145 has 16 divisors (see below), whose sum is σ = 409554820942272. Its totient is φ = 131462041289280.

The previous prime is 251231545253123. The next prime is 251231545253203. The reversal of 251231545253145 is 541352545132152.

It is a happy number.

It is not a de Polignac number, because 251231545253145 - 2¹⁵ = 251231545220377 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 251231545253094 and 251231545253103.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158007260371 + ... + 158007261960.

It is an arithmetic number, because the mean of its divisors is an integer number (25597176308892).

Almost surely, 2^{251231545253145} is an apocalyptic number.

It is an amenable number.

251231545253145 is a deficient number, since it is larger than the sum of its proper divisors (158323275689127).

251231545253145 is a wasteful number, since it uses less digits than its factorization.

251231545253145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316014522392.

The product of its digits is 3600000, while the sum is 48.

The spelling of 251231545253145 in words is "two hundred fifty-one trillion, two hundred thirty-one billion, five hundred forty-five million, two hundred fifty-three thousand, one hundred forty-five".