231545503400451 has 16 divisors (see below), whose sum is σ = 327456879066240. Its totient is φ = 145122935031360.

The previous prime is 231545503400399. The next prime is 231545503400473. The reversal of 231545503400451 is 154004305545132.

It is not a de Polignac number, because 231545503400451 - 2¹⁸ = 231545503138307 is a prime.

It is a super-2 number, since 2×231545503400451² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231545503408451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15504579610 + ... + 15504594543.

It is an arithmetic number, because the mean of its divisors is an integer number (20466054941640).

Almost surely, 2^{231545503400451} is an apocalyptic number.

231545503400451 is a deficient number, since it is larger than the sum of its proper divisors (95911375665789).

231545503400451 is a wasteful number, since it uses less digits than its factorization.

231545503400451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31009174306.

The product of its (nonzero) digits is 720000, while the sum is 42.

Adding to 231545503400451 its reverse (154004305545132), we get a palindrome (385549808945583).

The spelling of 231545503400451 in words is "two hundred thirty-one trillion, five hundred forty-five billion, five hundred three million, four hundred thousand, four hundred fifty-one".