1251320410531 has 16 divisors (see below), whose sum is σ = 1263700545408. Its totient is φ = 1239020640000.

The previous prime is 1251320410489. The next prime is 1251320410553. The reversal of 1251320410531 is 1350140231521.

It is a cyclic number.

It is not a de Polignac number, because 1251320410531 - 2¹⁵ = 1251320377763 is a prime.

It is a super-2 number, since 2×1251320410531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1251320410531.

It is not an unprimeable number, because it can be changed into a prime (1251320417531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29306260 + ... + 29348926.

It is an arithmetic number, because the mean of its divisors is an integer number (78981284088).

Almost surely, 2^{1251320410531} is an apocalyptic number.

1251320410531 is a deficient number, since it is larger than the sum of its proper divisors (12380134877).

1251320410531 is a wasteful number, since it uses less digits than its factorization.

1251320410531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43602.

The product of its (nonzero) digits is 3600, while the sum is 28.

The spelling of 1251320410531 in words is "one trillion, two hundred fifty-one billion, three hundred twenty million, four hundred ten thousand, five hundred thirty-one".