31451241035145 has 32 divisors (see below), whose sum is σ = 50380371385344. Its totient is φ = 16754544216000.

The previous prime is 31451241035143. The next prime is 31451241035171. The reversal of 31451241035145 is 54153014215413.

It is not a de Polignac number, because 31451241035145 - 2¹ = 31451241035143 is a prime.

It is a super-3 number, since 3×31451241035145³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31451241035143) 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, 46042164 + ... + 46720266.

It is an arithmetic number, because the mean of its divisors is an integer number (1574386605792).

Almost surely, 2^{31451241035145} is an apocalyptic number.

It is an amenable number.

31451241035145 is a deficient number, since it is larger than the sum of its proper divisors (18929130350199).

31451241035145 is a wasteful number, since it uses less digits than its factorization.

31451241035145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681693.

The product of its (nonzero) digits is 144000, while the sum is 39.

The spelling of 31451241035145 in words is "thirty-one trillion, four hundred fifty-one billion, two hundred forty-one million, thirty-five thousand, one hundred forty-five".