7540647231 has 16 divisors (see below), whose sum is σ = 10831242240. Its totient is φ = 4638835680.

The previous prime is 7540647217. The next prime is 7540647263. The reversal of 7540647231 is 1327460457.

It is not a de Polignac number, because 7540647231 - 2¹¹ = 7540645183 is a prime.

It is a super-2 number, since 2×7540647231² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 7540647231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7540647281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90646 + ... + 152636.

It is an arithmetic number, because the mean of its divisors is an integer number (676952640).

Almost surely, 2^7540647231 is an apocalyptic number.

7540647231 is a deficient number, since it is larger than the sum of its proper divisors (3290595009).

7540647231 is a wasteful number, since it uses less digits than its factorization.

7540647231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65126.

The product of its (nonzero) digits is 141120, while the sum is 39.

The square root of 7540647231 is about 86836.9001692253. The cubic root of 7540647231 is about 1960.9636410101.

The spelling of 7540647231 in words is "seven billion, five hundred forty million, six hundred forty-seven thousand, two hundred thirty-one".