251043144531253 has 8 divisors (see below), whose sum is σ = 251061947521880. Its totient is φ = 251024342112000.

The previous prime is 251043144531209. The next prime is 251043144531287. The reversal of 251043144531253 is 352135441340152.

It can be written as a sum of positive squares in 4 ways, for example, as 105322949713809 + 145720194817444 = 10262697^2 + 12071462^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 251043144531253 - 2²⁵ = 251043110976821 is a prime.

It is a super-2 number, since 2×251043144531253² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251043144531293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1277468503 + ... + 1277665003.

It is an arithmetic number, because the mean of its divisors is an integer number (31382743440235).

Almost surely, 2^{251043144531253} is an apocalyptic number.

It is an amenable number.

251043144531253 is a deficient number, since it is larger than the sum of its proper divisors (18802990627).

251043144531253 is a wasteful number, since it uses less digits than its factorization.

251043144531253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285687.

The product of its (nonzero) digits is 864000, while the sum is 43.

The spelling of 251043144531253 in words is "two hundred fifty-one trillion, forty-three billion, one hundred forty-four million, five hundred thirty-one thousand, two hundred fifty-three".