2151215534 has 24 divisors (see below), whose sum is σ = 3614637960. Its totient is φ = 958627488.

The previous prime is 2151215533. The next prime is 2151215543. The reversal of 2151215534 is 4355121512.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a junction number, because it is equal to n+sod(n) for n = 2151215497 and 2151215506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151215533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99932 + ... + 119535.

It is an arithmetic number, because the mean of its divisors is an integer number (150609915).

Almost surely, 2^2151215534 is an apocalyptic number.

2151215534 is a deficient number, since it is larger than the sum of its proper divisors (1463422426).

2151215534 is a wasteful number, since it uses less digits than its factorization.

2151215534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219524 (or 219511 counting only the distinct ones).

The product of its digits is 6000, while the sum is 29.

The square root of 2151215534 is about 46381.1980655955. The cubic root of 2151215534 is about 1290.9060665733.

The spelling of 2151215534 in words is "two billion, one hundred fifty-one million, two hundred fifteen thousand, five hundred thirty-four".