240551213551531 has 4 divisors (see below), whose sum is σ = 242144267946064. Its totient is φ = 238958159157000.

The previous prime is 240551213551513. The next prime is 240551213551589. The reversal of 240551213551531 is 135155312155042.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 240551213551531 - 2¹³ = 240551213543339 is a prime.

It is a super-2 number, since 2×240551213551531² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (240551213551331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 796527197040 + ... + 796527197341.

It is an arithmetic number, because the mean of its divisors is an integer number (60536066986516).

Almost surely, 2^{240551213551531} is an apocalyptic number.

240551213551531 is a deficient number, since it is larger than the sum of its proper divisors (1593054394533).

240551213551531 is a wasteful number, since it uses less digits than its factorization.

240551213551531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1593054394532.

The product of its (nonzero) digits is 450000, while the sum is 43.

The spelling of 240551213551531 in words is "two hundred forty trillion, five hundred fifty-one billion, two hundred thirteen million, five hundred fifty-one thousand, five hundred thirty-one".