215152540123542 has 16 divisors (see below), whose sum is σ = 491777234568192. Its totient is φ = 61472154321000.

The previous prime is 215152540123513. The next prime is 215152540123603. The reversal of 215152540123542 is 245321045251512.

It is a super-2 number, since 2×215152540123542² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 5122679526751 = 215152540123542 / (2 + 1 + 5 + 1 + 5 + 2 + 5 + 4 + 0 + 1 + 2 + 3 + 5 + 4 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 215152540123494 and 215152540123503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2561339763334 + ... + 2561339763417.

It is an arithmetic number, because the mean of its divisors is an integer number (30736077160512).

Almost surely, 2^{215152540123542} is an apocalyptic number.

215152540123542 is an abundant number, since it is smaller than the sum of its proper divisors (276624694444650).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215152540123542 is a wasteful number, since it uses less digits than its factorization.

215152540123542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5122679526763.

The product of its (nonzero) digits is 480000, while the sum is 42.

The spelling of 215152540123542 in words is "two hundred fifteen trillion, one hundred fifty-two billion, five hundred forty million, one hundred twenty-three thousand, five hundred forty-two".