231545505511545 has 16 divisors (see below), whose sum is σ = 370971426344832. Its totient is φ = 123324730430720.

The previous prime is 231545505511531. The next prime is 231545505511559. The reversal of 231545505511545 is 545115505545132.

It is an interprime number because it is at equal distance from previous prime (231545505511531) and next prime (231545505511559).

It is not a de Polignac number, because 231545505511545 - 2¹³ = 231545505503353 is a prime.

It is a super-2 number, since 2×231545505511545² (a number of 30 digits) contains 22 as substring.

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, 10387853616 + ... + 10387875905.

It is an arithmetic number, because the mean of its divisors is an integer number (23185714146552).

Almost surely, 2^{231545505511545} is an apocalyptic number.

It is an amenable number.

231545505511545 is a deficient number, since it is larger than the sum of its proper divisors (139425920833287).

231545505511545 is a wasteful number, since it uses less digits than its factorization.

231545505511545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20775730272.

The product of its (nonzero) digits is 7500000, while the sum is 51.

The spelling of 231545505511545 in words is "two hundred thirty-one trillion, five hundred forty-five billion, five hundred five million, five hundred eleven thousand, five hundred forty-five".