2158212951 has 32 divisors (see below), whose sum is σ = 3407961600. Its totient is φ = 1345161600.

The previous prime is 2158212941. The next prime is 2158213003. The reversal of 2158212951 is 1592128512.

2158212951 is a `hidden beast` number, since 2 + 1 + 582 + 1 + 29 + 51 = 666.

2158212951 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2158212951 - 2⁵ = 2158212919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158212941) 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, 53740 + ... + 84878.

It is an arithmetic number, because the mean of its divisors is an integer number (106498800).

Almost surely, 2^2158212951 is an apocalyptic number.

2158212951 is a deficient number, since it is larger than the sum of its proper divisors (1249748649).

2158212951 is a wasteful number, since it uses less digits than its factorization.

2158212951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31316 (or 31310 counting only the distinct ones).

The product of its digits is 14400, while the sum is 36.

The square root of 2158212951 is about 46456.5705901759. The cubic root of 2158212951 is about 1292.3042267396.

The spelling of 2158212951 in words is "two billion, one hundred fifty-eight million, two hundred twelve thousand, nine hundred fifty-one".