212631097 has 4 divisors (see below), whose sum is σ = 243006976. Its totient is φ = 182255220.

The previous prime is 212631091. The next prime is 212631101. The reversal of 212631097 is 790136212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 212631097 - 2²⁷ = 78413369 is a prime.

It is a super-2 number, since 2×212631097² = 90423966822846818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212631091) 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, 15187929 + ... + 15187942.

It is an arithmetic number, because the mean of its divisors is an integer number (60751744).

Almost surely, 2^212631097 is an apocalyptic number.

It is an amenable number.

212631097 is a deficient number, since it is larger than the sum of its proper divisors (30375879).

212631097 is an equidigital number, since it uses as much as digits as its factorization.

212631097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30375878.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 212631097 is about 14581.8756338134. The cubic root of 212631097 is about 596.8642860827.

The spelling of 212631097 in words is "two hundred twelve million, six hundred thirty-one thousand, ninety-seven".