15212303253 has 56 divisors (see below), whose sum is σ = 26105246976. Its totient is φ = 8679765600.

The previous prime is 15212303243. The next prime is 15212303261. The reversal of 15212303253 is 35230321251.

It is a happy number.

It is not a de Polignac number, because 15212303253 - 2¹⁶ = 15212237717 is a prime.

It is a super-2 number, since 2×15212303253² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15212303213) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 4187748 + ... + 4191378.

Almost surely, 2^15212303253 is an apocalyptic number.

It is an amenable number.

15212303253 is a deficient number, since it is larger than the sum of its proper divisors (10892943723).

15212303253 is an frugal number, since it uses more digits than its factorization.

15212303253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4477 (or 4462 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The spelling of 15212303253 in words is "fifteen billion, two hundred twelve million, three hundred three thousand, two hundred fifty-three".