1402540231 has 4 divisors (see below), whose sum is σ = 1418299200. Its totient is φ = 1386781264.

The previous prime is 1402540211. The next prime is 1402540283. The reversal of 1402540231 is 1320452041.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1402540231 - 2¹⁷ = 1402409159 is a prime.

It is a super-2 number, since 2×1402540231² = 3934238199147066722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1402540211) 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, 7879351 + ... + 7879528.

It is an arithmetic number, because the mean of its divisors is an integer number (354574800).

Almost surely, 2^1402540231 is an apocalyptic number.

1402540231 is a deficient number, since it is larger than the sum of its proper divisors (15758969).

1402540231 is an equidigital number, since it uses as much as digits as its factorization.

1402540231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15758968.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1402540231 is about 37450.5037482809. The cubic root of 1402540231 is about 1119.3651352564.

Adding to 1402540231 its reverse (1320452041), we get a palindrome (2722992272).

The spelling of 1402540231 in words is "one billion, four hundred two million, five hundred forty thousand, two hundred thirty-one".