213515051 has 2 divisors, whose sum is σ = 213515052. Its totient is φ = 213515050.

The previous prime is 213515017. The next prime is 213515077. The reversal of 213515051 is 150515312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213515051 - 2²² = 209320747 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213515251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106757525 + 106757526.

It is an arithmetic number, because the mean of its divisors is an integer number (106757526).

Almost surely, 2^213515051 is an apocalyptic number.

213515051 is a deficient number, since it is larger than the sum of its proper divisors (1).

213515051 is an equidigital number, since it uses as much as digits as its factorization.

213515051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 213515051 is about 14612.1542217429. The cubic root of 213515051 is about 597.6902410621.

The spelling of 213515051 in words is "two hundred thirteen million, five hundred fifteen thousand, fifty-one".