215230512031 has 4 divisors (see below), whose sum is σ = 216419631064. Its totient is φ = 214041393000.

The previous prime is 215230512011. The next prime is 215230512041. The reversal of 215230512031 is 130215032512.

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 215230512031 - 2¹⁹ = 215229987743 is a prime.

It is a super-2 number, since 2×215230512031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215230511987 and 215230512005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215230512011) 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, 594559245 + ... + 594559606.

It is an arithmetic number, because the mean of its divisors is an integer number (54104907766).

Almost surely, 2^215230512031 is an apocalyptic number.

215230512031 is a deficient number, since it is larger than the sum of its proper divisors (1189119033).

215230512031 is a wasteful number, since it uses less digits than its factorization.

215230512031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189119032.

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 215230512031 its reverse (130215032512), we get a palindrome (345445544543).

The spelling of 215230512031 in words is "two hundred fifteen billion, two hundred thirty million, five hundred twelve thousand, thirty-one".