1215402250231 has 32 divisors (see below), whose sum is σ = 1430904803328. Its totient is φ = 1023013221120.

The previous prime is 1215402250219. The next prime is 1215402250247. The reversal of 1215402250231 is 1320522045121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1215402250231 - 2¹⁷ = 1215402119159 is a prime.

It is a super-2 number, since 2×1215402250231² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1215402250231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215402250631) 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, 357526 + ... + 1599571.

It is an arithmetic number, because the mean of its divisors is an integer number (44715775104).

Almost surely, 2^{1215402250231} is an apocalyptic number.

1215402250231 is a deficient number, since it is larger than the sum of its proper divisors (215502553097).

1215402250231 is a wasteful number, since it uses less digits than its factorization.

1215402250231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1957231.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 1215402250231 its reverse (1320522045121), we get a palindrome (2535924295352).

The spelling of 1215402250231 in words is "one trillion, two hundred fifteen billion, four hundred two million, two hundred fifty thousand, two hundred thirty-one".