106631257 has 4 divisors (see below), whose sum is σ = 106928640. Its totient is φ = 106333876.

The previous prime is 106631219. The next prime is 106631281. The reversal of 106631257 is 752136601.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-106631257 is a prime.

It is a super-2 number, since 2×106631257² = 22740449938800098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106631557) 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, 148153 + ... + 148870.

It is an arithmetic number, because the mean of its divisors is an integer number (26732160).

Almost surely, 2^106631257 is an apocalyptic number.

It is an amenable number.

106631257 is a deficient number, since it is larger than the sum of its proper divisors (297383).

106631257 is an equidigital number, since it uses as much as digits as its factorization.

106631257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297382.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 106631257 is about 10326.2411844775. The cubic root of 106631257 is about 474.1999562880.

Adding to 106631257 its reverse (752136601), we get a palindrome (858767858).

It can be divided in two parts, 1066 and 31257, that added together give a palindrome (32323).

The spelling of 106631257 in words is "one hundred six million, six hundred thirty-one thousand, two hundred fifty-seven".