101512047 has 24 divisors (see below), whose sum is σ = 167505024. Its totient is φ = 53542944.

The previous prime is 101512009. The next prime is 101512051. The reversal of 101512047 is 740215101.

It is a happy number.

It is not a de Polignac number, because 101512047 - 2⁸ = 101511791 is a prime.

It is a super-2 number, since 2×101512047² = 20609391372260418, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101512097) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10753 + ... + 17850.

It is an arithmetic number, because the mean of its divisors is an integer number (6979376).

Almost surely, 2^101512047 is an apocalyptic number.

101512047 is a deficient number, since it is larger than the sum of its proper divisors (65992977).

101512047 is a wasteful number, since it uses less digits than its factorization.

101512047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28639 (or 28626 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 101512047 is about 10075.3187046366. The cubic root of 101512047 is about 466.4866238013.

Adding to 101512047 its reverse (740215101), we get a palindrome (841727148).

The spelling of 101512047 in words is "one hundred one million, five hundred twelve thousand, forty-seven".