215254273772 has 12 divisors (see below), whose sum is σ = 376698460320. Its totient is φ = 107626142256.

The previous prime is 215254273771. The next prime is 215254273811. The reversal of 215254273772 is 277372452512.

It is a happy number.

It is a super-2 number, since 2×215254273772² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (215254273771) 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, 467378 + ... + 805574.

It is an arithmetic number, because the mean of its divisors is an integer number (31391538360).

Almost surely, 2^215254273772 is an apocalyptic number.

It is an amenable number.

215254273772 is a deficient number, since it is larger than the sum of its proper divisors (161444186548).

215254273772 is a wasteful number, since it uses less digits than its factorization.

215254273772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497320 (or 497318 counting only the distinct ones).

The product of its digits is 1646400, while the sum is 47.

The spelling of 215254273772 in words is "two hundred fifteen billion, two hundred fifty-four million, two hundred seventy-three thousand, seven hundred seventy-two".